Which substance is found in RNA but not in DNA?

a. thymine
b. deoxyribose
c. ribose
d. guanine
e. cytosine


C

Biology & Microbiology

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If you were a conservation biologist in charge of the recovery plans for an endangered species, which would you prefer to find within that species—an even distribution of age classes or a pyramid-shaped age distribution? Why?

What will be an ideal response?

Biology & Microbiology

Most members of the phylum Platyhelminthes

a. are free-living. b. exhibit radial symmetry. c. do not show cephalization. d. are of a single sex. e. are parasites.

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The __________ gland produces hormones and is the site where __________ (a kind of white blood

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

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The formation of feathers, hair, and reptilian scales is based on completely different developmental patterns and genetic influences.

Answer the following statement true (T) or false (F)

Biology & Microbiology