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