Which of the following is an example of how natural selection is responsible for the variation seen in the human population?
A. Africans having a tall and skinny body to
dissipate heat
B. Inuits in Greenland having a stockier body
shape to retain heat
C. Africans carrying the sickle trait in areas
where malaria is prevalent
D. people in the northern regions having less
pigmentation in order to obtain more vitamin
D
E. All the answer options are correct.
E
You might also like to view...
Refer to the study by Poulsen et al. and the figure above. The data graphed in the figure could be an artifact if latrunculin A kills this species of diatoms (that is, that may be why the cells are not moving)
Which of the following would be the best evidence that latrunculin A is NOT killing the cells? A) When the toxin was washed off the culture, the cells began to move again. B) There were still a small percentage of motile cells in the culture treated with the toxin. C) Most of the cells in the control were moving, indicating that they were alive. D) When the toxin was applied to another species of diatom, 25% of them continued to move.
leaf cutter ant colonies, the ants clip leaves to feed a fungus garden and then the ants feed on the fungus. Is this a mutualistic relationship?
A. No, the ants are parasites on both the leaves and fungus. B. Yes, the ants and the trees are in a mutualistic relationship. C. No, the ants are leaf parasites but have no relationship with the fungus. D. Yes, the ants and the fungus are engaged in a mutually beneficial symbiotic relationship. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about leaf cutter ants and fungi? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which of the following describes the dikaryotic stage of a fungal life cycle in genetic terms?
a. 2n b. n + n c. n d. 2n + n
ALL of the following are natural human defenses against disease EXCEPT
a) interferon. b) penicillin. c) skin. d) mucous membranes.