Social behavior in which the "actor" makes a sacrifice for the benefit of the "recipient" is called ________
Fill in the blank(s) with correct word
altruism
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In determining the structure of ribozymes, why was it important that ribozyme sequences could be transcribed in vitro?
What will be an ideal response?
There are not many species of fish living deep in the oceans, but the deep-sea fish occasionally pulled up by fisherman have been bizarre creatures, such as the deep-sea anglerfish with its giant fangs and bioluminescent lure. Why have these fascinating deep-sea fish never been shown live on exhibit in an aquarium?
A. Their diet is too specialized. B. They are adapted to cold temperatures and total darkness. C. They might frighten visitors. D. They are adapted for high pressure, and will die at low pressure. 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 the deep sea environment? 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?
Some organisms are capable of asexual or sexual reproduction. Under favorable conditions, reproduction proceeds asexually. When conditions become more stressful, reproduction switches to a sexual mode. Why?
A) Sexual reproduction produces individuals with new combinations of recombined chromosomes increasing diversity. B) Sexual reproduction is simple and more rapid, allowing larger numbers of offspring to be produced. C) Asexual reproduction requires more energy. D) Sexual reproduction requires two separate individuals who can mutually provide nutrient support during stress.
The earliest primates arose about:a
200 million years ago. b. 125 million years ago. c. 55 million years ago. d. 22 million years ago. e. 12.5 million years ago.