Single-celled eukaryotes lacking a cell wall are
A. protozoa.
B. fungi.
C. algae.
D. insects.
E. water molds.
Answer: A
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Which of the following are the bones that form the bridge of the nose?
A) occipital B) sphenoid C) nasal D) temporal
Studies using fissure water from gold-mining operations nearly 3 km deep indicate that the bacteria present use what for energy?
a. organic carbon b. sulfur c. iron d. H2
Plasmodesmata are most similar to
a. gap junctions in animal cells. b. tight junctions in bacteria. c. basement membranes in animal cells. d. adhering junctions in heart muscle. e. both tight junctions in bacteria and adhering junctions in heart muscle