Comparable to humans, the Briard shepherd can get Leber amaurosis due to mutations in the RPE65 gene.
Explain about the Leber amaurosis?Since dogs and humans both have visual senses, determining if they can see involves little more than observing how they behave. Numerous anatomical characteristics of dog eyes and human eyes are similar.
Causes. At least 20 genes, all of which are required for retinal function and adequate vision, can experience variations (also known as mutations), which can lead to Leber congenital amaurosis. Numerous functions of these genes are involved in the formation and operation of the retina.
A series of congenital retinal dystrophies called Leber congenital amaurosis (LCA) causes severe visual loss at a young age. Nystagmus, sluggish or nearly nonexistent pupillary responses, significantly reduced visual acuity, photophobia, and excessive hyperopia are common symptoms in patients.
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at what point of an embryos development does its brand new neural structures turn on or quicken activating the senses of the body
Once stem cells turn into nerve and glial cells.
The outer trophoblast will form structures that will aid the growing embryo's implantation in the mother's uterus. Because the inner cell mass continues to differentiate and parts of it will eventually become the embryo, it is sometimes referred to as the embryoblast (the suffix "blast" means "to make").
First, the zygote develops into a solid ball of cells. The blastocyst develops into a hollow ball of cells. The blastocyst implants in the uterine wall, where it develops into an embryo attached to a placenta and surrounded by fluid-filled membranes.
A multicellular organism's embryo is the first stage of development.
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Mark ALL OF the statements that are true for DNA
a
bases held together by hydrogen bonds
b
bases are A, C, G and U
c
unzipped by helicase during replication
d
backbone of sugar molecule ribose and phosphate groups
e
found in the nucleus ofprokaryote cells
f
double helix
g
carries amino acids to ribosomes
h
bases are A, C, G and T
i
single helix
j
backbone of sugar molecule deoxyribose and phosphate groups
DNA is a double-helix molecule composed of two coiled strands. Each strand is formed by a sequence of nucleotides that carry genetic information. Options A, C, F, H, and J are TRUE.
What is DNA?DNA is a nucleic acid composed of two coiled strands, the double helix. This polymer is made of several nucleotides joined by their extremes that store genetic information.
Nucleotides are monomers containing a nitrogenated base, a phosphate group, and a sugar (deoxyribose).
Nitrogenated bases are purines (adenine and guanine) and pyrimidines (cytosine and thymine).
Adenine pair thymine through two hydrogen bonds, Guanine pairs cytosine through three hydrogen bonds.
During its replication, helicase is in charge of breaking hydrogen bonds and separating the two original strands, topoisomerase releases the tension between the strands, and DNA polymerase adds the correct nucleotides.
a) bases held together by hydrogen bonds ⇒ TRUE
b) bases are A, C, G and U ⇒ FALSE, bases are A, T, G, C
c) unzipped by helicase during replication ⇒ TRUE
d) backbone of sugar molecule ribose and phosphate groups ⇒ FALSE, the sugar is deoxyribose.
e) found in the nucleus of prokaryote cells ⇒ FALSE, prokaryote cells have DNA but not a nucleus
f) double helix ⇒ TRUE
g) carries amino acids to ribosomes ⇒ FALSE, tRNA carries amino acids to ribosomes during protein synthesis
h) bases are A, C, G and T ⇒ TRUE
i) single helix ⇒ FALSE, DNA is a double helix molecule.
j) backbone of sugar molecule deoxyribose and phosphate groups ⇒ TRUE
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6. What is thermal energy?
A) energy from sound
B) potential energy in chemical compounds
C) the movement of electrons
D) heat
Answer:
D) heat.
Explanation:
"Thermal", as defined by Oxford Languages, is relating to heat. In the case of thermal energy therefore, it is simply referring to how energy would react to either the heat, or the lack thereof.
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Fossils present in ______ layers of rock are older, according to the principle of superposition.
According to the superposition, principle fossils are present in sedimentary layers which are deposited sequentially.
What is the principle of superposition?According to the concept of superposition, sedimentary layers are deposited sequentially, and the layers at the bottom are older than the layers at the top unless the entire sequence has been flipped over by tectonic processes.
Geologists may connect rock layers from throughout the world by using the Law of Superposition, which stipulates that given an undisturbed horizontal succession of rocks,
Therefore the oldest rock layers will be on the bottom and increasingly younger rocks will be on top of them.
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4. Some people with spinal cord injuries do not sweat below the area of injury. Without the ability to sweat, the human body temperature begins to rise. Which statement would best describe this situation?
A) Feedback mechanisms regulate blood sugar levels.
B) Genetic mutations increase.
C) ATP energy is not available.
D) The dynamic equilibrium is broken.
Some people with spinal cord injuries do not sweat below the area of injury. Without the ability to sweat, the human body temperature begins to rise. The statement that describes this situation is: (D) The dynamic equilibrium is broken.
Spinal cord can also be called the backbone of the humans. It is a long bone that extends from below the brain to the hip region. There are 5 types of bones in the spinal cord that are present in varying number that make up a total of 33 bones.
Dynamic equilibrium state of the body is also called the condition of homeostasis. In this condition, the rate of loss is equal to the rate of gain. Any disruption from this state can cause severe consequences to the body.
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What is the process in which an mrna molecule is used to synthesize a specific polypeptide on a ribosome?.
the process by which an mRNA molecule is used to synthesize a specific polypeptide on the ribosome is called translation.
The translation is the process by which the nucleotide sequence in the mRNA is translated into the amino acid sequence of the polypeptide chain. During this process, selects 'read' information about messenger RNA (mRNA) and its function to make a protein.
The translation process itself is divided into 3 stages:
Initiation stage: In this stage, the ribosome assembles around the mRNA to be read and the first tRNA carries the amino acid methionine (which matches the start codon, AUG). This part is necessary for the translation stage to begin.Elongation: the stage where the amino acid chain is extended.Termination: the polypeptide chain is released.Learn more about translation mRNA here https://brainly.com/question/510682
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how does the diaphragm help the alveoli do their job during respiration
Answer:
The diaphragm works together with the intercostal muscles of the ribs to help the alveoli by expanding the chest cavity, thus increasing the volume. As the volume of the chest cavity increases the pressure inside it drops, allowing air from outside the body to be pulled in and fill the lungs/alveoli.
The diaphragm helps the alveoli during respiration by creating changes in air pressure that facilitate the movement of air in and out of the lungs.
The diaphragm is a dome-shaped muscle located at the base of the chest cavity, separating the thoracic (chest) cavity from the abdominal cavity. During respiration, the diaphragm plays a crucial role in facilitating the movement of air in and out of the lungs.
When the diaphragm contracts, it flattens and moves downward, increasing the volume of the thoracic cavity. This expansion of the thoracic cavity lowers the air pressure within the lungs, creating a partial vacuum. As a result, air from the external environment, which has a higher pressure, rushes into the lungs through the airways and eventually reaches the alveoli.
Alveoli are small, thin-walled sacs located at the ends of the bronchioles in the lungs. They are the primary sites of gas exchange, where oxygen from the inhaled air diffuses into the bloodstream and carbon dioxide, a waste product, diffuses out of the bloodstream into the alveoli to be exhaled.
The movement of the diaphragm creates changes in pressure within the thoracic cavity, causing air to move into the lungs and reach the alveoli. As the diaphragm relaxes and moves upward, the volume of the thoracic cavity decreases, increasing the air pressure within the lungs. This higher pressure forces air out of the lungs and out through the airways during exhalation.
In summary, the diaphragm's contraction and relaxation create changes in air pressure that enable air to be drawn into the alveoli during inhalation and expelled from the alveoli during exhalation. This process facilitates efficient gas exchange between the alveoli and the bloodstream, allowing oxygen to be taken in and carbon dioxide to be eliminated from the body.
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what happens when a number of organisms in an environment is higher than the carrying capacity
When the number of organisms in an environment is higher than the carrying capacity, the population most probably will decrease.
What is the carrying capacity?
The carrying capacity of an ecosystem is described as the maximum number of individuals that can be supported by a habitat. Every ecosystem has a fixed carrying capacity. The carrying capacity of any habitat primarily depends on two factors which is highlighted below:
The Food to eat.The space to live.If the number of organisms in an environment is higher than the carrying capacity, they feel the scarcity or limitation of food to eat and space to live, this creates more competition between the members of the same or different species which may lead to fighting for survival and death of the weaker organism.
We can conclude that any organism that has favorable variations of relative fitness will survive, and the rest will be eliminated by a habitat.
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what percentage of offspring will end up with a both homozygous recessive genotype and an expressed phenotype?
0 percent
50 percent
25 percent
100 percent
Option D. 100 percent, of offspring, will end up with a both homozygous recessive genotype and an expressed phenotype.
Concept:-
If two heterozygotes are crossed, the probability that an offspring will be homozygous recessive is 25% or 0.25. Homozygous dominant: 25% or 0.25. Heterozygous: 50% or 0.50.
If all games are homozygous than the offspring will be homozygous and same phenotype 100 percent.
The genotype of an organism is its entire set of genetic material. Genotype also can be used to refer to the alleles or versions a person includes in a specific gene or genetic place.
A genotype is a scoring of the sort of variant gift at a given region (i.e., a locus) inside the genome. it is able to be represented by way of symbols. as example, BB, Bb, and bb could be used to symbolize a given version in a gene.
A man's or woman's genotype is the combination of alleles that they possess for a particular gene. An individual's phenotype is the combination of observable characteristics or developments. even as an organism's genotype is directly inherited from its parents, the phenotype is simply motivated by using a genotype.
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How can using a dam as a source of freshwater also harm agricultural
resources?
O A. Dams can help control floodwaters.
B. Dams can displace organisms.
C. Dams can collect topsoil during floods.
D. Dams can damage existing habitats.
Using dams as freshwater sources can damage existing habitats.
What is the Environmental Impact of dams?
Freshwater habitats are severely harmed by dams, which has an impact on both humans and the environment. Dams, canals, and diversions already stop the flow of 60% of the world's major rivers. Dams and the infrastructure they are associated with, including irrigation systems, are a major cause of the disappearance of numerous freshwater habitats and species.
Dams cut off rivers from their marshes and floodplains. Freshwater ecosystems may suffer catastrophic harm. They affect fish migration patterns and inundate riparian habitats such as waterfalls, rapids, riverbanks, and wetlands. Dams alter the diversity and productivity of species by impeding the natural flow of sediment to deltas, estuaries, flooded forests, wetlands, and inland seas. Water quality is impacted by dam activities as well. Retention of water and sediment has an impact on the capability of rivers to handle waste and the quality of the water (the ability to break down organic pollutants). This might result in the creation of harmful hydrogen sulfide gas, further lowering the quality of the water.
Hence, the answer is, D. Dams can damage existing habitats.
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if the carbohydrate content of the diet is insufficient to meet the body's needs for glucose, which of the following can be converted to glucose? multiple choice fatty acids urea amino acids ketones
Amino acids are converted to glucose during gluconeogenesis, if the carbohydrate content of the diet is insufficient to meet the body's needs for glucose
What is gluconeogenesis?
It refers to the synthesis of new glucose from noncarbohydrate precursors, and provides glucose when dietary intake is insufficient or absent. It is essential in amino acid metabolism, and synthesis of carbohydrate-derived structural components.
It principally occurs in the liver and kidney.
Example: synthesis of blood glucose from lactate in the liver during recovery from intense muscular exertion.
Let us discuss other options:
Fatty acid molecules are joined together in groups of three, forming a molecule called triglyceride.Urea is produced from ammonia through the ornithine cycle and it is excreted in the urine.Ketone bodies are readily transported into tissues outside the liver, where they are converted into acetyl-CoA (acetyl coenzyme A) which enters the citric acid cycle and is oxidized for energy.Hence through the gluconeogenesis process amino acids are converted into glucose when a carbohydrate diet is insufficient to meet the body's needs.
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Bell-shaped distributions produced by plotting results of f2 and f3 crosses are typical of which type of inheritance?.
Plotting the results of f2 and f3 crossings resulted in Bell-shaped distributions, which represent multiple-factor inheritance.
What transpires when an inheritance ends?Lauren responds by fighting back, and as they struggle, Carson makes the claim that he is Lauren's biological father. However, Catherine seizes his gun and shoots Carson to death. All traces of Carson's captivity are eliminated when Lauren and Catherine work together to ignite the bunker by dousing it in gasoline and setting it on fire.
What is a bequest and why is it significant?Evolutionary change requires the inheritance of genetic material. It explains the genetic transmission process from one generation to the next. The fact that genetic inheritance is rarely taken into account in life history research may therefore at first seem surprising.
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What type of inheritance results when the phenotype of a heterozygote is intermediate between both homozygotes?.
It is known as incomplete dominance when there is an intermediate heterozygote phenotype between the two homozygote phenotypes.
What do genotype and phenotype exactly mean?Genotype refers to each person's unique DNA pattern. This phrase more particularly refers to the two alleles that a human received for a single gene. The observable manifestation of this gene is how a patient's disease presents clinically.
How may a phenotype be established?We examine the alleles of the parent organisms then predict the frequency at which those genes will be expressed by the offspring in order to determine a phenotypic ratio. Most of the time, we are aware of the expression and appearance of the alleles.
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post-translational control refers to:
The regulation of gene expression after transcription is referred to as post-translational control.
The control of gene expression at the RNA level is known as post-transcriptional regulation. It happens after the RNA polymerase has attached to the promoter of the gene and is synthesizing the nucleotide sequence. The control of active protein levels is referred to as post-translational regulation. There are various types. It is accomplished through either reversible events (posttranslational modifications such as phosphorylation or sequestration) or irreversible events.
Furthermore, the human proteome is dynamic, changing in response to a variety of stimuli, and post-translational modifications are frequently used to regulate cellular activity. PTMs are most commonly mediated by enzymatic activity and occur at distinct amino acid side chains or peptide linkages.
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a response that is uniquely directed against pathogenic bordetella pertussis would involve what component? a response that is uniquely directed against pathogenic bordetella pertussis would involve what component? inflammation the complement system antibodies skin barrier
The response that is uniquely directed against pathogenic bordetella pertussis involves antibodies.
The bacterium known as Bordetella pertussis, when inhaled when an infected person coughs or sneezes, releases toxins that attach to the tiny hair-like structures (cilia) that line the upper airways and damage them. . This causes the airways to swell and make breathing difficult.
Antibodies are proteins produced by the immune system in response to infection in the body. They are an important part of the body's defense system because they work to destroy disease-causing organisms (such as viruses and bacteria) and prevent them from infecting human cells.
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Do think straw can be turned into gold
Answer:
no yes no
Explanation:
.ctv6bb 6 yeah sine yrah
If an organism has a diploid number of 6 chromosomes, how many different combinations of maternal and paternal chromosomes are possible in its gametes?.
The different number of maternal and paternal chromosomes possible will be 8. that is option A is correct.
Chromosomes are defined as the genetic material within the body. They are thread like structures within the DNA and are made of proteins. In general human body has 23 pairs of chromosomes out of which 22 are numbered while 1 is the sex chromosome. Gametes are genetic material that are generally haploid in nature and they carry only one chromosome along with them. According to the question, there are 6 diploid chromosomes present which means there are 3 pairs of chromosomes. So each gametes will have a total number of 3 chromosomal pairs irrespective of their type that is maternal or paternal. Therefore combination of maternal and paternal chromosomes are given by
Combination = 2ⁿ where n is pair of chromosomes and here n = 3
Combination = 2³ = 8
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Complete Question :
If an organism has a diploid number of 6 chromosomes, how many different combinations of maternal and paternal chromosomes are possible in its gametes?
A. 8
B. 12
C. 3
D. 16
E. 6
Which type of plant separates initial co2 fixation and the calvin cycle by time?.
C4 plants separate initial co2 fixation and the Calvin cycle in time.
By utilizing an additional enzyme termed PEP during the initial stage of carbon fixation, C4 plants, such as maize, sugarcane, and sorghum, avoid photorespiration. This process happens in the mesophyll cells, which are close to the stomata where oxygen and carbon dioxide enter the plant.
The primary difference between C3 and C4 photosynthesis is that C3 photosynthesis uses the Calvin cycle to produce a three-carbon compound, and C4 photosynthesis uses the Calvin cycle to produce an intermediate four-carbon compound that splits into a three-carbon compound.
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We can learn about the climate of different periods throughout history by studying what aspect of the bubbles trapped in ice core samples?.
The earliest evidence that the concentration of carbon dioxide and the global temperature have been correlated for at least the last million years of Earth's history came from scientists' examination of the gases trapped in ice cores.
Ice cores can provide us with information about historical climate shifts?Ice cores provide direct data on past changes in greenhouse gas concentrations as well as direct evidence of the potential for sudden climate change in certain situations.
How do ice cores help us understand past climates?They gather ice cores in numerous locations all over the planet to research regional climate variability and to compare and distinguish it from global climate signals. They gather samples from the ice, known as ice cores, which contain a record of how our planet appeared hundreds of thousands of years ago.
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What process produces most of the nadh that contributes to atp synthesis in the cell?.
Glucose enters the cell during the glycolysis process. Two pyruvate, which are required for the following step, are produced by the cell after it passes it via a series of chemical processes. Furthermore, it produces two ATP and two NADH, which are then transported to the mitochondria.
What activity causes the majority of the cell's ATP production?About thirty-two ATP molecules are produced for every oxidised glucose molecule during cellular respiration, which takes place mostly in the mitochondrial matrix.
The citric acid cycle, the second stage of aerobic cellular respiration, is the mechanism responsible for the production of both NADH and FADH2. Glycolysis, the citric acid cycle, and the electron transport chain are the three basic processes that make up aerobic cellular respiration.
ATP is generated during the glycolysis phase.
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A species of mouse that was once killed.by a certain disease is now resistant to the disease? Which state,e explains how
this most likely happened?
Th mice had no genetic variation so they were able to eventually resist the disease together
Some individual mice grew stronger so they could resist the disease and pass the resistance to their offspring
The mouse species wanted to change its genes so it could resist the disease
Some individual mice that were resistant to the disease survived and reproduced offspring. Those that weren't resistant died.
A species of mouse which was once killed by a certain disease is now resistant to the disease because some individual mice that were resistant to the disease survived and reproduced offspring. Those that weren't resistant died. Thus, the correct option is D.
What is the transfer of resistant genes?Resistant genes is the gene which contains the information for the production of a protein that makes an antibiotic ineffective on that organism and hence confers resistance against that antibiotic to a pathogen.
The transfer of resistant genes can occur in organisms. Acquired resistance from the parents can occur through horizontal transfer of genes between the bacterial species, or by vertical transmission that can occur between mother and offspring at birth and during lactation period, or spontaneously due to the exposure to an antibiotic. These genes help the organism to survive in the antibiotic medium and produce offspring.
Therefore, the correct option is D.
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Because of base pairing in DNA, the percentage of
a. adenine in DNA is about equal to the percentage of guanine
b. thymine in DNA is about equal to the percentage of adenine
c. adenine in DNA is about greater than the percentage of thymine
d. thymine in DNA is about greater than the percentage of guanine
Answer:
Thymine is about equal to the percentage of adenine.
Priya, an 8-year old, is experiencing a major growth spurt. This past year, she has grown 3 inches in height. Which phase of puberty is priya most likely experiencing?.
Priya is in adrenarche phase of puberty.
Adrenarche is a normal physiological increase in androgen production in the adrenal glands that causes pubic and armpit hair growth, increased oiliness of the skin and hair, adult body odor, and mild acne.
Adrenarche is another developmental stage that usually occurs at least two years before puberty.
Puberty is the process of physical changes in which a child's body matures into that of an adult capable of sexual reproduction. It is caused by hormonal signals from the brain to the gonads and testicles in boys and in ovaries in girls.
You can start from 9 years old. Puberty is a process that takes several years. Most girls hit puberty by the time she's 14. Most boys finish puberty by the age of 15 or he is 16.
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Under the right temperature and ph, phospholipids may have formed from precursors and assembled into.
Under the right temperature and pH, phospholipids may have formed from precursors and assembled into membrane like structures.
Phospholipids are lipid compounds made up of phosphoric acids, nitrogen bases, alcohol, and fatty acids. These compound lipids are important components of the cell membrane and give it a fluid appearance. This fundamental cellular structure serves as a barrier to protect the cell from various environmental insults while also allowing multiple cellular processes to occur in subcellular compartments.
Phosphatidylcholine, phosphatidylethanolamine, phosphatidylinositol, and phosphatidylserine are the most common phospholipids. Phospholipids are extremely important because they surround and protect internal cell components. They provide a structurally sound membrane that contributes to both the shape and functionality of cells because they do not mix with water.
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Some students are playing ultimate frisbee in a grass field. After their game, they forget a frisbee on the field. The frisbee is dark black and therefore zero PAR (photosynthetically active radiation) passes through the frisbee. Is the following statement true or false? Why? The grass under the frisbee will be metabolically inactive until the frisbee is removed during the next day' s game.
a. The statement is false. Plants can rely on stored energy and be metabolically active even in the absence of sunlight
b. The statement is false. Plants have associations with other organisms and therefore will almost never be metabolically inactive.
c. The statement is true. Plants require sunlight, water, and CO2 to photosynthesize.
d. The statement is true. Plants go dormant when they do not have access to light
e. The statement is false. Plants can use heat energy to photosynthesize, and the black frisbee will heat up as it absorbs PAR.
False, plants also store energy and exhibit respiration and plants use this stored energy to function.
Photosynthesis is a process that plants and other organisms use to convert light energy into chemical energy that can then be released to fuel the organism's activities via cellular respiration. The pea pod used sunlight energy to build sugar molecules with the help of carbon dioxide and water. When the rabbit ate the pea pod, it received energy from the sun that was stored in the plant's sugar molecules.
Photosynthesis' primary function is to convert solar energy into chemical energy and then store that chemical energy for later use. This process powers the majority of the planet's living systems.
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Which of the following are reasons that garden peas ended up being a good organism for genetic experiments?-Had many varieties with easily identifiable differences.
-True-breeding lines could be established.
-Could be manually cross-pollinated.
-Easy to cultivate.
-Phenotypic traits were simple and distinct.
Garden peas made an useful organism for genetic research for the following reasons. had a wide variety with distinguishable characteristics. There may be established true-breeding lines. conceivably cross-pollinated by hand. simple to cultivate Simple and unique phenotypic features were present.
Which of the following best describes why garden peas made a suitable subject for genetic research?Garden peas are an excellent genetics study subject for the following reasons, which is why Gregor Mendel opted to utilize pea plants in his experiments:
existence of discernible features in many forms.
yields several offspring from a single cross.
a brief life cycle.
pollination may be controlled easily (cross-pollination).
Because it has opposing features, typically self-pollinates, and develops quickly, the garden pea plant makes an ideal subject for researching heredity.
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1. A mineral sample is found to have a density of
3.0 grams per cubic centimeter. It is then broken
into two pieces, with one piece twice as large as
the other. The smaller of the two pieces will
have a density of
(1) 1.0 g/cm³
(2) 1.5 g/cm³
(3) 3.0 g/cm³
(4) 6.0 g/cm³
A mineral sample is found to have a density of 3.0 grams per cubic centimeter. It is then broken into two pieces, with one piece twice as large as the other. The smaller of the two pieces will have a density of 3.0 g/cm³.
A mineral is defined as "an inorganic element or compound that occurs naturally and has an ordered internal structure, a distinctive chemical composition, a crystallographic form, and physical qualities." Rocks, which are naturally occurring solids made up of one or more minerals, are different from minerals.
Quartz, feldspar, mica, amphibole, olivine, and calcite are examples of common minerals.
a naturally occurring, uniformly crystalline, inorganic solid with a distinct chemical composition, crystalline structure, color, and hardness. Azurite, aragonite, biotite, calcite, garnet, gold, and pyrite are examples of different types of minerals.
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Which of the following is an accurate comparison of watersheds and aquifers?
A.
one involves water collection above ground and the other below ground
B.
one involves small bodies of water and the other involves large bodies of water
C.
one contains water that is retrievable and the other contains irretrievable water
D.
one contains fresh water and the other contains saltwater
On the other hand, deeper (confined) aquifers are less likely to follow surface features and have watersheds (or basins) that are governed by geologic reasons. Thus, option C is correct.
What comparison of watersheds and aquifers?In general, surface aquifers (the water table) resemble surface-water watersheds, and their flow typically does not cross borders at the surface.
Due to the fact that groundwater flows from high points (where it divides) to low places, groundwater watersheds conceptually are comparable to surface-water watersheds (outlets, discharge areas).
Therefore, A watershed is made up of both the subsurface groundwater and aquifers that provide water to the network of streams that drains the surface land area.
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Give two examples of abiotic factors that can affect population size.
Answer:
disease, food supply, and increased predation.
Photoreceptors are distributed over the entire neural retina, except where the optic nerve leaves the eyeball. This site is called the __________.
The blind spot is the region where the optic nerve leaves the eyeball and the photoreceptor cells(light-sensitive cells) are absent.
What is a blind spot?
It is a small portion of the visual field of each eye that corresponds to the position of the optic disc within the retina located to the right of the center of vision of the right eye and vice versa in the left eye. There are no photoreceptors (rods and cones) in the optic disc and hence there is no image detection in this area.
The nerve fibers route before the retina, blocking some light and creating a blind spot where the fibers pass through the retina and out of the eye.
Rod and cone photoreceptors are specialized neurons that function in the initial step of vision. Photoreceptor cells lie at the back of the retina adjacent to the retinal pigment epithelium (RPE), a cell layer that is vital for the survival of photoreceptors.
Because of the absence of photoreceptor cells, objects are obscured entirely by the blind spot and unseen in monocular vision.
Hence blind spot is the region of the optic nerve where photoreceptor cells are absent and there is no vision.
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