Between the following options the one that best explains how resistance to a disease could spread in a population is by organisms that are disease resistant are most likely to survive and reproduce in the population, that way the resistance trait will stay in the population.
Which statement about the greenhouse effect is true?A.The greenhouse effect filters out harmful radiation.B.The greenhouse effect helps moderate temperature on Earth.C.Gases such as carbon dioxide and water vapor insulate the Earth.D.Both B and C
The greenhouse effect is caused by gasses such as carbon dioxide and water vapor, which absorb heat and reradiate the the heat back to the earth. Since in the greenhouse effect heat is retained, the greenhouse gasses act as thermal insulators to the Earth. These effect also moderates the temperatur on Earth. Having said this, the answer is D.
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In order for daughter cells to contain a complete set of DNA and chromosomes, the genome of a cell must be duplicated before it divides. The nucleus must accurately separate chromosomes. At the same time, the cytoplasm must divide and the organelles must be distributed to the daughter cells. Which model BEST describes the sequence of events in a normal cell division?
A) cytokinesis -> mitosis -> G1 -> S -> G2
B) S -> G1 -> G2 -> mitosis -> cytokinesis
C) G1 -> S -> G2 -> mitosis -> cytokinesis
D ) mitosis -> G1 -> S -> G2 -> cytokinesis
Mitosis -> G1 -> S -> G2 -> cytokinesis best describes the sequence of events in a normal cell division.
What are the features of cell division?
Cell division is the process by which a parent cell divides into two daughter cells. Cell division usually occurs as part of a larger cell cycle in which the cell grows and replicates its chromosome before dividing.
Moreover, mitosis is a process of nuclear division in eukaryotic cells that occurs when a parent cell divides to produce two identical daughter cells.
The continuity of life is based on the reproduction of cells, or cell division. Cell division functions in reproduction, growth, and repair.
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why do scientists use an adjusted average instead of just an ordinary average?
The adjusted mean is used by scientists because it could be able to eliminate the inconsistences in the data set that could be caused by outliers.
What is an average?The term average has to do with the men of a data set. It is the singe value that defines the mid point of the data set. This is why we refer to the mean as a measure of the central tendency of a data set.
However, the ordinary mean could be affected by cases where the data has a large variation in the values especially in the presence of values that could be judged as outliers.
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Which part of a neuron is responsible for receiving messages from other neurons?
Question 11 options:
Dendrite
Myelin sheath
Cell body
Axon
Answer:
cell or axon
Explanation:
Question 7 of 10
After reading about gravity, Paolo tests his hypothesis that a feather and a
marble will fall at the same rate. If the marble falls faster, what should Paolo
do next?
A. Look for other factors that affect how fast something falls
B. Decide that the hypothesis is useless because it made an
incorrect prediction
C. Conclude that his science textbook was mistaken about gravity
OD. Report that the results of the experiment were wrong
Answer:
Paolo should (A) Look for other factors that affect how fast something falls
Explanation:
in the feathers case, the upthrust of the wind could be an external factor that affects the results
in which order does water moves in a root hair cell from the soil to the vocuole
Answer:
The movement of water from the soil into the cell vacuole of a root hair cell.
Explanation:
Which of the following terms is used to describe the amount by which a stimulus must increase or decrease before it’s noticeable by an individual?
Question 4 options:
Difference threshold
Absolute threshold
Conditioned response
Signal-detection theory
The following terms are used to describe the amount by which a stimulus must increase or decrease before it’s noticeable by an individual the Difference threshold. Option A.
Absolute threshold is the minimum level of stimulus that can be detected usually defined as at least half the time. Commonly used in neuroscience and experimental research the term can be applied to any stimulus that can be perceived by the human senses including sound touch taste sight, and smell.
The absolute threshold is the minimum amount of stimulus a human needs to perceive 50% of the time. The difference threshold is the smallest change in a stimulus that a human perceives with a 50% chance of her. Sometimes we are interested in how much stimulus is needed to distinguish between different stimuli. This is called just a noticeable difference or difference threshold.
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3. Select the set of peas that are both heterozygous for pea seed color
Assuming a diallelic gene coding for one feature, heterozygous individuals are those who carry one dominant and one recessive allele. The set of peas that are both heterozygous for pea seed color are Yy x Yy. Option 3.
What is an heterozygous individual?
Assuming diploidy, an heterozygous individual is the one that carries in its genotype one dominant and one recessive allele from the same gene.
The heterozygous individual's phentoype depends on the inheritance pattern and on the interaction of the involved gene with other genes (if there is interaction).
In the exposed example, the gene that codes for seed color is diallelic (Y and y) and expresses complete dominance, meaning that the dominant allele hides the expression of the recessive allele in heterozygous individuals.
The set of peas that are both heterozygous for pea seed color are Yy x Yy. Option 3.
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The ____________ is most sensitive to horizontal movements, while the ____________ responds best to vertical movements.
The utricle is most sensitive to horizontal movements, while the saccule responds best to vertical movements.
To sense linear acceleration, gravity forces, and tilting movements, the vestibular system makes use of two additional organs known as the otolith organs. The utricle and the saccule are the two otolith organs found in the vestibular labyrinth. The saccule senses movement in the vertical plane, whereas the utricle is only designed to detect movement in the horizontal plane.
Macula is the sensory organs in the otolith organs which bear hair cells like that in semicircular canals. The vestibular system employs this knowledge of movement acquired through the otolith organs and semicircular canals to maintain posture, stability, and balance.
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Genetics practice- horses worksheets answers key
The semicircular canals of the inner ear detect rotational and/or angular movement of the head, or ____________ equilibrium.
The semicircular canals of the inner ear detect rotational and/or angular movement of the head, or rotational equilibrium.
Any kind of head movements, rotational or angular movements, are determined by semi-circular canals of the inner ear. This rotational or angular movements of the head to maintain balance are termed as rotational equilibrium.
The inner ear is in charge of encoding information concerning equilibrium, or the feeling of balance, along with audition. Mechanoreceptors, which are hair cells with stereocilia, sense our bodies' motion as well as the position and movement of our heads. The vestibule of the inner ear is where these cells are situated. The utricle and saccule detect head position, while the semicircular canals detect head movement.
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In living cells, the term osmosis is used to describe the movement of water from high to low concentration across the plasma membrane. Predict the result if a plant cell is placed in a solution that has the same solute concentration as the cell.
a. Water movement in and out is balanced.
b. Water is at equilibrium and therefore stops moving in and out of the cell.
c. All solutes will be gathered into a central vacuole, reducing the solute concentration of the cytoplasm.
d. All solutes leave the cell, but the water molecules are retained by the central vacuole.
Option A is correct because water movement in and out is balanced. Because osmosis occurs in both directions equally, the cell size will be the same.
What is osmosis?Osmosis is the naturally occurring transfer of solvent molecules from a lower concentration solution to a higher concentration solution over a semi-permeable membrane. Examples of osmosis in everyday life include: becoming thirsty after eating salty food. Kidney dialysis in the excretory system. Resins and other seeds swell when they are submerged in water.
The following is the definition of osmosis that you will find in most textbooks: Osmosis is the movement of water molecules through a cell's partially permeable membrane from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules.
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This chemical equation represents a chemical reaction.
CaCO3 + 2HCI CO₂ + CaCl2 + H₂O
Which chemical is a reactant in this reaction?
OA. CaCl₂
B. H₂0
OC. HCI
D. CO₂
Which is the correct order of smallest to largest?
a. Organ, tissue, system, cell
b. Cell, tissue, organ, system
c. System, tissue, cell, organ
d. Cell, organ, tissue, system
Given the recent evidence suggesting that species change due to certain genetic variations, which of these is true.
Answer:
Genetic variation is the change in the genetic composition of an individual or between a population. It is caused due natural selection and mutation.
Explanation:
Have good day
Continental drift. Much more modern day evidence has come to light to support this theory. Early on, Alfred Wegner cited the geological set of continental coast lines; it was noted that the coast lines of south America and west Africa seem to match up, today we have more evidence. Using the graphic in the statements below, elaborate on how the fossils remains of mesosaurus, A freshwater crocodile like reptile that lived between 286 in 258 million years ago, provide support for the theory of continental drift. Which statement does not apply.
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Answer: The correct answer (the statement that does NOT apply) is A. Mesosarurus swam from one continent to the other in breeding pairs.
Explanation:
The remains of Mesosaurus (a freshwater crocodile-like reptile living between 286 and 258 million years ago) have been found in Southern Africa and Eastern South America. Scientists have proven that Mesosaurus was not capable of swimming between the continents, so the presence of their fossils on two continents has proven the theory of continental drift. There is additional evidence that supports continental drift, where the two continents were connected.
The characteristic that best helps define an organism as a member of a particular species is which of the following?
Question 5 options:
It looks like other organisms.
It can successfully breed with similar organisms.
It lives in the same region as similar organisms.
If they are able to reproduce they will produce fertile offspring.
Species is defined as a group of organisms that can interbreed and produce fertile offspring. This means that if two organisms can have offspring and if those offspring can reproduce and produce offspring they are of the same species. Measured by the number of species insects certainly make up the largest proportion of living organisms in the world. Over one million species of insects have been documented and studied by scientists.
A population is a group of organisms of the same species living in the same area at the same time. A species is a type or type of organism. For example, all humans belong to one species the scientific name for our species is Homohis sapiens and are distinct from other species such as gorillas dogs and dandelions. The concept of morphospecies states that species are distinguished from other species by physical characteristics and can be identified by morphological characteristics.
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8. What molecules make up the outside "backbone" of this DNA molecule a.The bonded nitrogenous bases b.The phosphates and sugarsc.The phosphates and nitrogenous basesd.The sugars and nitrogenous bases
The molecules that make up the outside "backbone" of a DNA molecule are the phosphates and sugars (b), while inside the DNA molecule are the nitrogenous bases that form hydrogen bonds pairs between the strands of DNA, holding them together.
Energy and MatterDescribe the energy transformations that occur during photosynthesis and cellular respirationDescribe how energy is used in the body
The human body carries out its main functions by consuming food and turning it into usable energy. Immediate energy is supplied to the body in the form of adenosine triphosphate (ATP). Since ATP is the primary source of energy for every body function, other stored energy is used to replenish ATP
Cellular respiration needs oxygen and produces carbon dioxide, whereas photosynthesis consumes carbon dioxide and produces oxygen. Free oxygen is required for cellular respiration by us and most other organisms
What is the role of RNA?
Answer:
The primary function of RNA is to create proteins via translation. RNA carries genetic information that is translated by ribosomes into various proteins necessary for cellular processes. mRNA, rRNA, and tRNA are the three main types of RNA involved in protein synthesis.
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Answer the following questions in complete sentences:
1. Explain the difference between the greenhouse effect and global warming.
2. Based on your knowledge of how the greenhouse effect works, why does the level of carbon dioxide affect the global temperature?
3. Name three sources of atmospheric carbon dioxide.
Answer:
1. Global warming is the change in the climate of the earth causing it to heat up whereas the greenhouse effect is a naturally occurring phenomena, constantly occurring due to the atmosphere and sunlight.
2. Carbon dioxide absorbs heat radiating from the Earth's surface and re-release it in all directions—including back toward Earth's surface.
3. Decomposition, ocean release and respiration.
What is the net charge on the protein: Glu-Ala-Ser-lys-Val-Arg-Phe-Ile-His at a pH value of 6.5?
The net charge on the protein with amino acid sequence Glu-Ala-Ser-lys-Val-Arg-Phe-Ile-His will be positive.
Proteins are the biomolecules that are made up of amino acid monomers. They are very essential for the living body as they are required in the building and repair of the body. The primary sequence of proteins defines their functionality.
Amino acids are the organic compounds that are essential for the formation of proteins. Amino acids can be positive, negative or neutral in charge. Since the given sequence in the question has more positively charges amino acids( Lys, Arg, His) than the negatively charged amino acids( Glu, Asp) that is why the net charge of the protein is positive.
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Question 2
Were the seeds in the "G" tube undergoing respiration? Use your results in Data Table 1 and Graph 1 to support your answer. Do your results
support your hypothesis?
Answer:
no
Explanation:
table and graph to validate the question!
Seeds are living organisms, and like all living organisms, they undergo cellular respiration to produce energy for their metabolic processes.
Cellular respiration is the process by which cells break down glucose and other organic molecules in the presence of oxygen to produce ATP (adenosine triphosphate), the energy currency of the cell. The equation for aerobic respiration in seeds is:
Glucose + Oxygen → Carbon dioxide + Water + ATP
During germination, seeds become metabolically active and start cellular respiration to provide the necessary energy for the seedling to grow and develop.
To determine if the seeds in the "G" tube were undergoing respiration, one would need to measure the consumption of oxygen and the release of carbon dioxide over time. If oxygen is being consumed and carbon dioxide is being produced, it indicates that respiration is taking place.
As for whether the results support the hypothesis, it depends on the specific hypothesis that was tested. If the hypothesis predicted that the seeds would undergo respiration during germination, and the data in Data Table 1 and Graph 1 showed oxygen consumption and carbon dioxide production, then the results would support the hypothesis.
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How do you know the surface water is not there because the sediment is saturated?
The area below the water table is known as the saturated zone, and it is where all of the pore spaces between the sediment particles are filled with water.
Even in the lack of any silt or other sediment, depending on the kind of soil, the presence of surface water may still be a possibility.
On the stream bed, sediment particles are typically stationary and only move when the water is flowing swiftly enough to push them out of place. Typically, larger sediment particles weigh more, therefore the water must flow more quickly to be able to move the material.
Describe a sediment.Sediment is a term used to describe solid material that has been moved and deposited in a new location. Sediment contains rocks, minerals, as well as fragments of plants and animals. It might be as big as a boulder or as small as a single sand grain.
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How do psychiatrists differ from clinical psychologists?
Question 7 options:
Psychiatrists typically can’t prescribe medication.
Clinical psychologists earn a medical degree and become physicians.
Psychiatrists earn a medical degree and become physicians.
Clinical psychologists typically prescribe medication.
Psychiatrists differ from clinical psychologists as psychiatrists earn medical degrees and become physicians.
What distinguishes a psychiatrist most sharply from a clinical psychologist?A psychiatrist is a medical doctor and may write prescriptions, which is the biggest distinction between the two professions.Although psychologists frequently hold doctoral degrees, they are not medical doctors and did not attend medical school.While psychiatrists focus on finding medical or pharmacologic treatments for mental illness or abnormal behaviors, psychologists typically work closely with clients to uncover and work through psychological difficulties and establish appropriate coping mechanisms for emotional problems.
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What is something that you have changed your mind about in biology? Make your own answer:
Students' biology experiences also aid in the development of their environmental literacy is something that has changed my mind about biology.
The significance of biology can be seen from a variety of angles. The study of life lies at the heart of biology, first and foremost.The interaction between all living and nonliving entities is also thoroughly explained scientifically. Third, it illuminates the diversity of life forms.
In addition, biology covers a variety of other scientific disciplines that are concerned with the viability of life, such as those that investigate the environment, the ecosystem, the quality of food, the origins of disease, the creation of pharmaceuticals, and the human body, to mention a few.
Homeostasis, energy transfer and utilization, the connection between structure and function, and change over time are key biological principles on which students should concentrate.
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(1) Many organisms of the same species living in an area make up a population. (2) Populations in an area make up a community. (3) An ecosystem is all living and
nonliving things in an area. (4) The living things depend on each other to survive.
If this sentence were added to the paragraph, what transition would best indicate that a pond is an example of a community?
Why do some kinds of mutations cause greater changes in proteins than others? (Consider the different types of mutations and how they effect proteins made differentely)
Some types of mutations can cause greater changes in proteins because they result in a different amino acid being translated. This different amino acid provokes a different primary structure, a different active conformation and, in the end, a different biological activity. A certain type of point mutation (when a single base pair is altered), for example, can lead to this when it is a missense mutation. It can also lead to translate to a synonymous codon (coding for the same amino acid), but in this case it does not effect the protein and the mutation is called silent.
Please HELP!!!?! Describe competitive and noncompetitive in inhibitors describe how mutations can lead to resistance with non-competitive inhibitors
The competitive inhibitor binds to the active site and inhibits substrate binding. The noncompetitive inhibitor binds to the enzyme at a different site. It does not prevent substrate binding, but it causes other changes in the enzyme that prevent it from efficiently catalyzing the reaction.
What is competitive inhibitor?Competitive inhibitor is defined as a chemical pathway is disrupted when one chemical substance inhibits the effect of another by competing for binding or bonding.
Noncompetitive inhibitor is defined as a type of enzyme inhibition in which the inhibitor reduces enzyme activity while binding equally well to the enzyme.
Thus, the competitive inhibitor binds to the active site and inhibits substrate binding. The noncompetitive inhibitor binds to the enzyme at a different site. It does not prevent substrate binding, but it causes other changes in the enzyme that prevent it from efficiently catalyzing the reaction.
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Describe two ways that each of the following pairs are similar with each other and two ways in which they differ from each other.a) facilitated diffusion vs. active transport
Solution:
Similarities:
1. Facilitated diffusion and active transport are two methods involved in the transport of molecules across the cell membrane.
2. In both facilitated diffusion and active transport, transmembrane proteins participate in the passage of molecules across the plasma membrane.
Differences:
1. The facilitated diffusion is the process when the diffusion of molecules across the plasma membrane occurs from a higher concentration to a lower concentration while active transport occurs against the concentration gradient.
2. The facilitated diffusion does not require energy to transport molecules across the membrane. while in the active transport energy is required to transport molecules across the membrane.