The presence of a vertebral column is the characteristic that best describes vertebrates.
A vertebral column distinguishes vertebrates from other animals. All vertebrates are chordates, and as such, they share the following distinguishing characteristics:
A stiff rod that runs the length of the animal (it could be the vertebral column or the notochord) Humans and all other vertebrates have a notochord when they are embryos, and it grows into the vertebral column eventually. The alimentary canal is located below the vertebral column, where a network of nerves runs above it. The animals have a mouth either directly below or at their anterior portion. The anus, which opens outward, is where the alimentary canal comes to an end. The anus is followed by the tail.
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FILL IN THE BLANK. we breathe primarily by using muscles that enclose the ____________ cavity.
Answer:
pleural cavity
Explanation:
pleural cavity
what changes occur in height, weight, and body composition with aging? what accounts for these changes? how do these changes affect maximal oxygen uptake?
The changes that occur in height, weight and body composition with aging are loss of bone density, weaker muscles, decrease in height and weight can vary according to the diet intake by the body.
It is believed that reduction in height growth stops at the age of 20 for most of the people but studies how that height continue to increase till the age of 35-40 years but then it stops because of compression of the intervertebral disk. Osteopenia is the reduction in bone mineral density and osteoporosis refers to severe loss of bone mass with deterioration of the microarchitecture of bone. It causes increased chances of fracture. It also has hormonal links in adults along with poor diet and low exercise. Weight gain is common during pregnancy (in women) and excess caloric intake, and inability to mobilize fat stores but as age increases, weight decreases as body loses bone calcium and muscle mass. Exercise training can help to alter these process or slow the deterioration rate to some extent. It will also enhance oxygen uptake by the body.
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if chlorophyll were red instead of green, making plants red in appearance, which color of light would you expect to produce the lowest rate of photosynthesis? white light blue light red light green light
If chlorophyll were red instead of green, making plants red in appearance Because the energy is at its peak in these light ranges, the higher on the light spectrum lights, like blue and violet, indicate the fastest rate of photosynthesis in plants.
Plants use the photosynthetic pigment chlorophyll, which absorbs light rays to use during photosynthesis (synthesis of glucose).
If a plant has red chlorophyll, it will only absorb red light and not any other hues of light. Red light therefore produces the least amount of photosynthesis.
Therefore, it would be expected that the red color of light would result in the lowest rate of photosynthesis if chlorophyll were red instead of green, giving plants a red appearance.
The process of producing carbohydrates (glucose) through photosynthesis uses sunlight that is captured by the chlorophyll pigment found in plant cells.
The primary photosynthetic pigment in plants, chlorophyll, absorbs light photons to carry out photosynthesis.
Any other colors of light besides red will not be absorbed by a plant if its chlorophyll is red. This indicates that plants will produce the least amount of photosynthesis when exposed to red light.
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a population isolated by a geographic barrier becomes a new species as it accumulates changes by natural selection or genetic drift.target 1 of 5 2. in blank, a new species may arise as
In allopatric speciation, a population isolated by a geographic barrier becomes a new species as it accumulates changes by natural selection or genetic drift.
Speciation is the phenomenon of formation of a new species from a group of individuals. Speciation is said to happen when the two population groups are not able to breed with each other. This reproductive isolation could be generated due to various reasons.
Genetic drift is the change in the gene frequency of a population by random chance. Genetic drift is only observed in small populations. The change in gene frequency usually results in the decrease of genes in the population.
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The enzyme dna covalently links nucleotides to synthesize new dna strands together during dna replication.
a. True
b. False
The enzyme DNA polymerase covalently links nucleotides to synthesize new DNA strands together during DNA replication. The given statement statement is true.
A particular kind of enzyme called DNA polymerase (DNAP) is in charge of creating fresh nucleic acid molecules that are copies of the original DNA. Polymers are large molecules made of smaller, repeating units that are chemically linked to one another. Nucleic acids are polymers.
As it moves along the single strand DNA template, DNA polymerase reads the nucleotide bases as it goes, adding additional complementary nucleotides to the primer to create a sequence that is complementary to the template. 749 nucleotides are thought to be replicated by DNA polymerase every second.
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Complete question :The enzyme DNA polymerase covalently links nucleotides to synthesize new DNA strands together during DNA replication.
A. True
B. False
describe the genetic mutations that you think occurred in the cancer cells that were responsible for the phenotypic differences between the healthy and cancer cells you observed.
Genetic mutations are changes in the genetic material of a cell that can cause alterations to its phenotype. The phenotypic differences between healthy and cancer cells can be attributed to a number of different types of genetic mutations that can occur in the cells.
The most common type of genetic mutation associated with cancer cells is the somatic mutation. This occurs when a single gene in the cell is mutated, leading to changes in the cell’s structure and function. Somatic mutations can lead to changes in the proteins produced by a cell, which can cause changes in the cell’s ability to divide, survive, or differentiate. These changes can lead to uncontrolled cell division, which is a major trait of cancer cells.
Another type of genetic mutation associated with cancer cells is chromosomal abnormalities. These occur when pieces of chromosomes are either missing or rearranged. Chromosomal abnormalities can lead to changes in the proteins produced by a cell, as well as changes in the expression of other genes. These changes can also lead to uncontrolled cell division, making them a common feature of cancer cells.
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what type of transport is needed to move molecules of the substance from outside the cell to inside
Where do bacteria live?
a) anywhere
b) in volcanoes
c) in salty water
d) almost anywhere
Answer:
d) almost anywhere
Explanation:
Bacteria can live almost anywhere, including in soil, water, and even in extreme environments such as hot springs and volcanic areas.
They are found in almost every habitat on Earth. Some bacteria can even live inside other organisms, such as plants and animals.
Answer:
à) anywhere
Explanation:
bacteria is found all over ..
a student observes the phenotypic traits of several hundred students at her school.which observation provides the strongest evidence that the genes encoding the two traits display genetic linkage?
most students that have black hair also have straight hair
Hair of type 1A is very fine, straight, and devoid of any wave or curl. Because it is so straight and delicate, it tends to look oily when the natural oils reach the ends. It is the most uncommon hair kind and is typical of Asian ladies.
One of the more noticeable characteristics of human variety is hair morphology, which is especially varied among people of European heritage, where about 45% of people have straight hair, 40% have wavy hair, and 15% have curly hair.
The MC1R gene is typically present in two functional copies, one from each parent. Due to the elevated levels of eumelanin, these people have black or brown hair. More than 90% of people in the globe are thought to have dark or black hair.
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write a summary statement for saturated fats including wether they are solids or liquids at room temperature and wether they have all single carbon to carbon bonds or at least one double carbon to carbon bond
Answer:
Explanation:
Saturated fats are a type of fat that is solid at room temperature and contains only single carbon-carbon bonds. These fats are typically derived from animal sources, such as meat and dairy products, and are commonly found in processed and fried foods. They are considered less healthy than unsaturated fats, which are typically liquid at room temperature and contain at least one double carbon-carbon bond, because they can raise cholesterol levels and increase the risk of heart disease. However, small amounts of saturated fats can be part of a healthy diet when consumed in moderation and paired with an overall healthy lifestyle.
the mycelial growth habit leads to a body with a high surface-area-to-volume ratio.
Mycelia have a large surface area for absorption.
Mycelium is a fungus root-like structure made up of branching, thread-like hyphae. Mycelium-based fungal colonies can be found in and on soil as well as many other substrates. Mycelia play an important role in the breakdown of plant material in terrestrial and aquatic habitats. They contribute to the organic part of soil, and their growth releases carbon dioxide back into the atmosphere.
Mycelium can be unappealing since it might appear as white fuzz that resembles mould. While we would never advocate eating anything mouldy or mushrooms without first confirming that they are suitable for human nutrition, most mycelium is safe to consume and completely edible.
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what are the functions of simple sugars
Answer: produce a spike in blood glucose, providing the body with a short-lasting source of energy.
Explanation:
if dna is damaged or incompletely replicated in s phase, the inhibition of which of these molecules prevents the cell from entering m phase?
a. Cdc6
b. Cdc25
c. S-Cdk
d.ORC
Answer:
CDK
Explanation:
If DNA is damaged or incompletely replicated in S phase, the inhibition of cyclin-dependent kinase (CDK) prevents the cell from entering M phase.
During S phase, the DNA of a cell is replicated in preparation for cell division. If this replication is incomplete or if the DNA is damaged, it can lead to problems with the cell's ability to divide properly. In such cases, the cell will not be able to enter M phase, which is the phase of the cell cycle in which the cell divides into two daughter cells.
One of the key molecules that controls the transition from S phase to M phase is cyclin-dependent kinase (CDK). CDK is an enzyme that plays a critical role in the regulation of the cell cycle. It is activated by a protein called cyclin, which is produced during S phase.
When DNA is damaged or incompletely replicated in S phase, the levels of cyclin are likely to be reduced. This, in turn, can lead to the inhibition of CDK, preventing the cell from entering M phase. As a result, the cell will not be able to divide properly, and this can have serious consequences for the health of the organism.
In summary, if DNA is damaged or incompletely replicated in S phase, the inhibition of CDK can prevent the cell from entering M phase. This helps to protect the organism from the potential harmful effects of damaged or incompletely replicated DNA.
what is upwelling (biology)
In biology, upwelling is the process by which deep, cold, nutrient-rich water rises to the surface of the ocean, often along the coastline. This occurs when the wind blows parallel to the coast and pushes the surface water away from the shore, allowing deeper water to rise to the surface.
Upwelling is an important process in the ocean because it brings nutrients from the deep ocean to the surface, where they can be used by phytoplankton and other small organisms. This, in turn, supports the growth of larger organisms such as fish, which depend on the phytoplankton as a food source. Upwelling also helps to cool the surface water and can have a significant impact on local climate and weather patterns.
Most sympathetic effector junctions release norepinephrine but a significant number release acetylcholine instead. Which of these is an example of an organ of the cholinergic type?
A) the heart
B) a blood vessel in the skin
C) a sweat gland
D) the liver
E) the salivary glands
Most sympathetic effector junctions release norepinephrine but a significant number release acetylcholine instead. A sweat gland is an example of an organ of the cholinergic type. So option c. is correct.
Eccrine sweat glands occur over most of the body and extend directly onto the skin's surface. Apocrine glands open into the hair follicle, directing to the surface of the skin. One target organ of the cholinergic neurons is the eccrine sweat glands in the skin. A functional cholinergic innervation of sweat glands is a a requirement to yield and secrete sweat in most mammalian species, and swaeting can be potently obstructed by anticholinergic agents.
Sweat glands are coiled tubular structures crucial for regulating human body temperature.
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How are meiosis and mitosis different?
A. Only mitosis produces haploid cells from diploid cells.
B. Mitosis has two rounds of nuclear division, but meiosis has only one.
C. Meiosis results in four cells, but mitosis results in two cells.
D. Chromatids form only during the process of meiosis.
Answer:
C. Meiosis results in four cells, but mitosis results in two cells.
Explanation:
Mitosis is a process where a single cell divides into two identical daughter cells (cell division), whereas meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information.
which part of the electrical pathway of the heart sends nerve impulses to the ventricles and causes them to contract and pump blood?
Answer:
the sinus node
Explanation:
The sinus node
The sinus node generates an electrical stimulus regularly, 60 to 100 times per minute under normal conditions. The atria are then activated. The electrical stimulus travels down through the conduction pathways and causes the heart's ventricles to contract and pump out blood
he area around a charged object that can exert a force on other charged objects is an electric
.
Answer:
AN ELECTRIC FIELD
Explanation:
An electric field is a region around a charged object where the object's electric force is exerted on other charged objects. Electric fields get weaker the farther away they are from the charge
which portion of the coronavirus spike protein anchors the virus to the ace-2 protein binding site?
The S1 subunit of spike protein in the SARS-CoV-2 anchors the virus to the ace-2 protein binding site.
A virus named SARS-CoV-2 is responsible for the recently discovered disease known as Coronavirus disease (COVID-19). Four structural proteins, known as the S (spike), E (envelope), M (membrane), and N (nucleocapsid) proteins, are present in this virus. The SARS-CoV-2 spike (S) protein is made up of two subunits, S1 and S2, and is essential for receptor identification and cell membrane fusion. The host receptor angiotensin-converting enzyme 2 (ACE2) is recognized and bound by the receptor-binding domain of the S1 subunit, while the two-heptad repeat domain of the S2 subunit facilitates the fusing of the viral cell membrane. The S1 subunit associates with ACE2 to encourage the creation of endosomes, which triggers viral fusion activity in the host cell.
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how is a true breeding yellow-seeded pea plant different from a hybrid yellow-seeded pea plant?
A hybrid yellow-seeded pea plant possesses genotype (Aa) - one dominant, one recessive allele, whereas true-breeding yellow-seeded pea plants have (AA) - both dominant alleles.
Even though they have the same phenotypic, true breeding yellow-seeded pea plants differ from hybrid yellow-seeded pea plants because their genotypes are different.
They have the same genotype but different phenotypes, the same phenotype but different genotypes, the same genotype and phenotype, and they have a different genotype and phenotype.
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1. Which of the following hormone is expected to increase in the body after consuming a banana split?
(a) Growth hormone
(b) Testosterone
(c) Insulin
(d) Thyroid hormone
superantigen type toxins lead to the release of excessive amounts of __________________ stimulating a hyperactive immune response that can lead to shock and death in the affected individual.
Superantigen type toxins lead to the release of excessive amounts of cytokines stimulating a hyperactive immune response that can lead to shock and death in the affected individual.
In the field of biology, such a kind of antigen that is responsible for the production of an excessive immune response is referred to as a superantigen.
As a result of superantigen-type toxins invading the body, more cytokines will be produced. This is because cytokines are sites of the body that are involved in the production of immune cells. Ahyperactivates immune response can be shocking for the body and the brain might pass a message to kill its own immune cells. Hence, this can lead to the death of an individual.
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all dna polymerases require a primer with a 3’ oh group to begin dna synthesis. the primer is:
All DNA polymerases require a primer with a 3’ oh group to begin dna synthesis. The primer is a short stretch of RNA nucleotides.
DNA polymerases are characterised by their inability to manufacture new DNA strands from scratch, i.e., without first polymerizing 2 dNTPs. Instead, DNA is synthesised by DNA polymerases that need a stable primer that is already attached to the template strand. Primers are needed because DNA polymerases, which add deoxyribonucleotides to a fresh DNA strand, can only do so to the 3'-OH group of the an existing chain and cannot start synthesis from scratch.
Without an existing 3′-OH, DNA polymerase cannot create new DNA. As a result, an RNA primer is needed for DNA replication to begin before strand creation. While RNA polymerase is utilised during transcription to create the mRNA strand, DNA polymerase creates a DNA strand and is employed in DNA replication. Contrary to DNA polymerase, RNA polymerases need not truly have proofreading mechanisms and do not always require the so-called primer to begin the activity.
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which trait is present in apes but absent in hominins? group of answer choices mesial bridge diastema gingival space dental gap previousnext
Great apes have a hole between the upper canines and molars to account for huge lower canines. In human advancement, teeth, jaws, and canines decreased in size, and people lost the diastema
Over numerous ages, early hominin legs developed longer and a lot further than their arms. Their feet turned out to be longer and created curves for more productive help of their bodies. Likewise, their hands turned out to be more capable of conveying and controlling items like apparatuses and food. Contrasted with present-day people, numerous hominins had toothier mouths. The "Nutcracker," (otherwise known as Paranthropus boisei), a hominin that lived 2.3 a long time back, had the biggest molars and thickest finish of any hominin. Homo erectus, which was experienced all around the world 1.5 a long time back, had bigger canines than present-day people.
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FILL IN THE BLANK. if a rational function is proper, then _______ is a horizontal asymptote.
if a rational function is proper, then y=0 is a horizontal asymptote.
A rational function's horizontal asymptote can be found by examining the degrees of the numerator and denominator. If N is the numerator's degree and D is the denominator's degree, and N D, then the horizontal asymptote is y = 0. Divide the numerator by the denominator to obtain the asymptote. The equation for the slant asymptote is the quotient.
A horizontal asymptote is a parallel line to which a portion of the curve is very close. However, a HA should never contact any section of the curve (but it may cross the curve). Example: Determine the horizontal asymptote of the function f(x) = 2x / 2. (x - 3). So y = 2 is the HA of the function.
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FILL IN THE BLANK. fungi are multicellular decomposers that obtain nutrients by _____________.
Fungi are multicellular decomposers that obtain nutrients by extracellular digestion.
Decomposing organisms eat dead things: animal feces and leaf litter are examples of dead plant materials. As the Earth's cleanup crew, they provide a valuable service. Dead leaves, insects, and animals would accumulate everywhere without decomposers.
Food is mechanically or acidically broken down outside the cell by special molecules called enzymes during extracellular digestion. The nearby cells can then take in the nutrients that have just been broken down. When fungi eat, they use extracellular digestion. The food is broken down into components that their cells can use by their teeth, enzymes, and acid in the stomach and enzymes in the small intestine.
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FILL IN THE BLANK. generally speaking, deserts are located in places where air masses are usually ________.
Deserts are located in the regions where the air masses are usually descending.
Deserts are the large masses of barren lands that contain sand. These areas have little to no vegetation and also do not have any huge water bodies. The precipitation is very low in such areas. About one-fifth of the Earth's land area is conquered by deserts.
Air mass can be defined as the volume of air at a significant uniform temperature, pressure and humidity. The air masses can extend for kilometers of area in any direction. The example of air masses is: Polar, Arctic, Equatorial, Tropical, etc.
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rank these events in the order in which they occur in the heart, beginning with the p wave.
The order of the events in ECG is P wave, atrial contraction, QRS complex, ventricular contraction, t wave, ventricular relaxation.
This is an illustration of the heartbeat waves seen during an ECG. The sequence is as follows:
The first wave to be recognized, the P wave, is connected to both right and left atrial depolarization and atrial contraction.Atrial contraction (systole).The complex QRS is The second wave, which is connected to both the right and left ventricular depolarization, appears to be visible.contraction of the ventricles.T wave – represents rapid phase 3 current when ventricular repolarization takes place.Ventricular unwind (diastole) What is ECG?The procedure of electrocardiography(ECG) involves creating an electrocardiogram, a recording of the electrical activity of the heart. It is a heart electrogram, which uses electrodes applied to the skin to create a graph of voltage vs time for the electrical activity of the heart.
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Complete Question:
Rank these events in the order in which they occur in the heart, beginning with the p wave.
t wave, atrial contraction, ventricular contraction, QRS complex, P wave, ventricular relaxation.
Rank from earliest to latest. To rank items as equivalent, overlap them.
3. Finish the Punnett square showing two pink (RW) flowers crossed.
Answer:
results RR, RW, RW, WW
Explanation:
percentage of pink = 2/4 = 50%
percentage of white = 1/4 = 25%
percentage of red = 1/4=25%
why might the cricket genome have eleven times as many base pairs as that of drosophila melanogaster?
There must be more non-coding DNA in crickets. The genome of the cricket may contain 11 times more base pairs than the genome of the Drosophila melanogaster.
What is DNA and what does it do?DNA is the molecule of information. It provides the knowledge required to produce proteins, another type of substantial molecule. Each of your cells contains 46 substantial structures genetic code that are distributed throughout these instructions. These chromosomes are made up of numerous smaller segments of DNA, called genes.
What are the three main goals of the DNA?Nowadays, DNA has three distinct functions: genetic, immune, and functional, all of which are significantly different between each other and rely on the letters and the sugar - phosphate backbone backbone in different ways. Ribonucleotide reductases in modern cells break down ribonucleotides di- or tri to produce DNA precursors.
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