Hereditary information (with the exception of some viruses) is preserved in:
A) deoxyribonucleic acid.
B) membrane structures.
C) nuclei.
D) polysaccharides.
E) ribonucleic acid.
Ans: A) deoxyribonucleic acid.
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Annelids are characterized by (select all that apply):
A. cylindrical, segmented bodies. B. extensive nervous systems. C. radula for feeding. D. hydrostatic skeletons. E. ecdysis.
Which plant specialization mutually benefits the young root and a fungus? a. All of these choices
b. Root nodules c. Mycorrhizae d. Root hairs e. None of these choices.
The descriptive term ectotherm, when applied to reptiles, refers to the fact that:
a. they are warm-blooded b. they derive their body heat from outside of their body by certain behaviors c. their central body core works best when its temperature is the same as the ambient temperature d. their optimum temperature for muscle contraction occurs only when the sun provides direct solar heat e. they maintain their temperature by adjusting the production of metabolic heat
Of the following, which is not a characteristic of protists?
A. They have membrane-bounded organelles. B. They have a nucleus. C. They are prokaryotes. D. They are eukaryotes. E. All of the answer choices are correct.