Why are choanoflagellates considered to be the ancestor of animals?
A. similarities in tissue structure.
B. similarities in embryonic development.
C. molecular data.
D. similarities in Hox genes.
Answer: C
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A gram-negative, oxidase-positive diplococcus growing on chocolate agar likely belongs to the genus
A) Neisseria. B) Escherichia. C) Mycobacterium. D) Pseudomonas.
Which animal taxon is named for the cuticle or external skeleton that its members secrete and
periodically molt?
a. Deuterostomia b. Ecdysozoa c. Reptilia d. Lophotrochozoa e. Protostomia
Excess glucose in the human diet can result in
accumulations of
a. pyruvate. b. NADH. c. fats. d. lactate. e. ATP.
How can one grass species be dominant one year, while another is dominant a few years later and then the first becomes dominant again?
A) changes in precipitation across years B) Lotka-Volterra models predicting cycling C) competitive exclusion principle D) growth rate differences among the species