Which of the following cells are alive at maturity?

a. sieve tube members
b. vessel members
c. tracheids
d. fibers
e. sclereids


ANSWER: a

Biology & Microbiology

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Some terrestrial plants use bicarbonate (HCO3-) as a carbon source for photosynthesis

Indicate whether the statement is true or false

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A(n) (acidic/metallic/fluorescent) molecule is one that absorbs invisible radiation and emits visible light.

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

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Polypeptide chains are synthesized from _____ instructions by _____.

A) mRNA, ribosomes B) mRA, lysosomes C) tRNA, DNA D) tRNA, ATP

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