The water vascular system of echinoderms _____
A) functions as a circulatory system that distributes nutrients to body cells
B) functions in locomotion and feeding
C) is bilateral in organization, even though the adult animal is not bilaterally symmetrical
D) moves water through the animal's body during suspension feeding
E) is analogous to the gastrovascular cavity of flatworms
Answer: B
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A population of mountain goats are split because of the formation of a glacier. After 50 years the glacier melts and the population reunites. Hybrid zones may occur if
A. both pre-mating and post-mating isolating mechanisms occur. B. reproductive isolation is incomplete. C. a geographic barrier is removed after reproductive isolation is complete. D. both pre-mating and post-mating isolating mechanism occur and reproductive isolation is complete. E. both pre-mating and post-mating isolating mechanisms occur and a geographic barrier is removed after reproductive isolation is complete are correct.
The Kubler-Ross model of coping has no bearing today on understanding how people experience the prospect of dying.
Indicate whether the statement is true or false
The differences between males and females of a species are called ________
A) sexual morphism B) male/female dimorphism C) sexual differentiation D) sexual dimorphism
A characteristic that is independently acquired by reversal or convergent evolution exhibits homology
_____________________ Indicate whether the statement is true or false.