In which organ are T-lymphocytes finally matured?

A. Lymph nodes
B. Bone marrow
C. Spleen
D. Thymus
E. Tonsils


Ans: D. Thymus

Biology & Microbiology

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In some plants, companion cells become modified into phloem cells that facilitate the short-distance

transport of various organic solutes from the symplast into the apoplast.

Indicate whether the statement is true or false.

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Approximately how much of the mammalian genome is composed of repetitive DNA?

What will be an ideal response?

Biology & Microbiology

Multiple sclerosis is a result of

A) demyelination of nerve cells. B) excess myelin on nerve cells. C) a decrease in postsynaptic receptors. D) blocking the nodes of Ranvier. E) proteolytic cleavage of presynaptic SNARE proteins.

Biology & Microbiology

Increases in the level of body fat produce increases in body __________, which require additional energy to main them - and decreases in the level of body fat have the opposite effects.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology