Which lymphoid organ is required for the selection of a functional population of T lymphocytes (T cells) for the immune system?
What will be an ideal response?
thymus
Biology & Microbiology
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The toxins of stingrays are destroyed with hot water, therefore they are a type of:
a. protein. b. carbohydrate. c. fat. d. lipid. e. DNA.
Biology & Microbiology
Which lineage(s) diverged before the turtle lineage?
a. mammalian d. mammalian and amphibian b. amphibian e. amphibian and lizard c. lizard
Biology & Microbiology
The measure of the concentration of solutes in a solution is ____
a. tonicity b. osmosis c. hydrostatic pressure d. diffusion e. facilitated diffusion
Biology & Microbiology
A couple who does not have cystic fibrosis but are both heterozygous has already had three girls with cystic fibrosis,
and are hoping to have a normal child for their fourth. What are the chances that the fourth child will be a normal male? a. 0 b. 1/8 c. 1/4 d. 3/8 e. 1/2
Biology & Microbiology