The organism that causes malaria
a. is a multicellular protozoan.
b. is the anopheles mosquito.
c. attacks the protein globin in skin cells.
d. is a single-celled protozoan.
e. causes the overproduction of red blood cells.
D
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The human skeleton is a typical vertebrate
A. endoskeleton. B. appendicular skeleton only. C. axial skeleton only. D. exoskeleton. E. hydrostatic skeleton.
Plants lacking xylem and phloem are known as _________.
A. vascular plants B. nonvascular plants C. semi-vascular plants D. gametophytes E. ferns
Bacteria that are unable to synthesize tryptophan are referred to as ________.
A) prototrophs B) auxotrophic for tryptophan C) auxotrophic for histidine
The formation of new species over many generations is an example of:
A) gene pools. B) macroevolution. C) allelic variants. D) microevolution.