Development of the neural system is characterized by
A. body parts being shaped and patterned into a specific form.
B. cells becoming specialized in structure and function.
C. cell division and growth in size.
D. All of the choices are correct.
E. None of the choices are correct.
Answer: D
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Top-down factors that can control the population sizes of plants or animals include
A. seed-dispersing birds. B. parasites and predators. C. widespread phoresy. D. resource partitioning. E. Batesian mimicry.
In invertebrates, such as flatworms, groups of neurons called ____ perform common functions
a. nerve cords b. ganglia c. brains d. nerve nets e. radially symmetrical
The discovery of the fossilized remains of Archaeopteryx in 1860 set forth the hypothesis of birds being closely related to
A. dinosaurs. B. salamanders. C. bats. D. butterflies. E. bees.
Which is NOT a compound?
a. salt (NaCl) b. a carbohydrate (contains C, H and O) c. carbon (C) d. a nucleotide (contains P, C, H, and O) e. methane (CH4)