The building blocks of nucleic acids are

a. amino acids.
b. nucleotides.
c. pentose sugars.
d. phosphate groups.
e. nitrogenous bases.


Answer: b

Biology & Microbiology

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Tolerance is the acquired ability to make an adaptive immune response directed to self-antigens

Indicate whether the statement is true or false.

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At a low sugar region of a plant, sugars move from ____ into ____

a. sieve elements; source cells b. sieve elements; sink cells c. xylem; phloem d. phloem; source cells e. the low pressure phloem; the high pressure plant tissue

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What adaptations have evolved in birds to assist them in flight?

What will be an ideal response?

Biology & Microbiology

The simplest sugars are called ____________________, and two of these sugars linked together form a(n)

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

Biology & Microbiology