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Which of the following is a difference between B cells and T cells?
a.One has a major role in antibody production, while the other has a major role in cytotoxicity.b.One uses a receptor called BCR, while the other recognizes a receptor called TCR.c.B cells are activated by free-floating antigens in the blood or lymph. T cells are activated by membrane-bound antigens.d.T cells are produced in the thymus and B cells are produced in the bone marrow.
Spiny species of diatoms are found both in warm subtropical waters in addition to in colder areas. Since warm water is less dense than cold water, would you predict any differences between the spines of warm-water and cold-water individuals? Why.
The thalamus is a brain structure that constantly recieves incoming visual, auditory, olfactory, tactile, thermal, and nociceptive sensory data at any given instant.
Explain why people addicted to methamphetamines often sleep very little, suffer extreme mood swings, and become very thin.
The movement of transposable elements can cause either forward mutations or reversions.
Explain the etiology and genetics of disease phenylketonuria (PKU) Phenylketonuria (PKU) refers to a disease found within humans in which the affected individual does not have enzyme phenylalanine hydroxylase.
The Entner-Doudoroff pathway, which is used by some microorganisms, including the talented Sinorhizobium meliloti:
The recordings thus reflect the summed total of thousands to millions of potassium, sodium and other ion-selective channels.
Semen is a mixture of sperm and fluids from the accessory organs of the male reproductive tract. Describe the role of these fluids and what organ they are secreted from.
Using the respirometer-manometer, you observed the amount of oxygern being used by animals in a closed chamber. What happened to the carbon dioxide the animals produced while in the chamber?
It is commonly reported that up to 50 percent of a cell's energy budget is spent on protein synthesis. Think about the properties of two hypothetical genetic codes constructed with the four common nucleotides.
If there are five alleles at a locus, how many genotypes may there be at this locus? How many different kinds of homozygotes will there be? Again with 8 alleles at a locus.
What is a major difference between mitosis and meiosis I.
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