Which of the following is a characteristic of viviparity?
a. Young being born alive and in varying states of maturity
b. Embryos obtaining nourishment from the egg’s yolk
c. Young being born with both male and female reproductive systems
d. Embryos developing into haploids or diploids
a. Young being born alive and in varying states of maturity
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Members of the____ phylum have radial symmetry, and use their two tentacles to capture prey. They have eight
longitudinal plates of cilia that they use for movement, making them the largest animals to use cilia as their primary means of locomotion.
a. Nematoda b. Cnidaria c. Porifera d. Rotifera e. Ctenophora
Four of the following statements are true of predator-prey coevolution. Which one is FALSE?
a. Each species exerts selection pressure on the other. b. Predators are selective agents that favor improved prey defenses. c. Prey with better defenses are selective agents that favor better predator hunting skills. d. Coevolution only occurs in animals and is usually seen after one reproductive generation. e. Camouflage, warning coloration, and mimicry are all examples of coevolution tactics.
The "fluid mosaic" model of the plasma membrane describes the plasma membrane as a solid, inflexible structure with a certain distribution of proteins that does not vary from cell to cell
a. true b. false
Plant cells often have a large membrane-bound sac that is used for storing water and other substances called a:
A. Golgi body. B. central vacuole. C. centriole. D. nucleus. E. chloroplast.