Which of the following statements about speciation is correct?
A) The goal of natural selection is speciation.
B) When reunited, two allopatric populations will not interbreed.
C) Natural selection chooses the reproductive barriers for populations.
D) Prezygotic reproductive barriers usually evolve before postzygotic barriers.
E) Speciation is included within the concept of macroevolution.
Answer: E) Speciation is included within the concept of macroevolution.
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Which of the following is not a mechanism by which viruses cause cancer?
A. An expression of viral proteins results in abnormal expression of genes that regulate cell growth and reproduction. B. They carry a cancer-causing gene into the cell. C. They encode proteins that bind to and inactivate host cell proteins known as tumor suppressor proteins. D. They produce defective interfering particles.
Among the vascular plants, single-veined leaves are characteristic of the ____
Fill in the blank with the appropriate word.
Organs are composed of tissues, which are composed of cells. This is an example of which characteristic of life?
A. Living things grow and develop B. Living things respond to stimuli C. Living things maintain themselves by homeostasis. D. Living things have levels of hierarchical organization. E. Living things are adapted to the environment.
What is the flash pattern used by female fireflies to attract males of their species an example of?
A. a sign stimulus B. an innate releasing mechanism C. a supernormal stimulus D. sexual imprinting Clarify question: What is the key concept addressed by the question?. Gather Content: What do you already know about animal behavior? 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? Reflection 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?