what is the mechanism of clonal de-selection (deletion) called?
What will be an ideal response?
apoptosis, or programmed cell death
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Pea fowl (peacocks and peahens) show sexual dimorphism -- males have long blue-green tail feathers with eyespots, while females have short brown tail feathers. Which statement best describes the graphed data about peacocks?
A. There are no peacocks with less than 140 eyespots.
B. The fewer eyespots that a peacock has in his tail, the more mates he attracts.
C. Actually eyespots have very little to do with mate-attracting activities.
D. The more eyespots that a peacock has in his tail, the more mates he attracts.
E. There are no peacocks with more than 165 eyespots.
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 sexual selection? 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?
Because of the high pressure and cold temperatures, few species of organisms survive in the deep benthic zone of the ocean
Indicate whether the statement is true or false
Aerobic respiration, anaerobic respiration, and fermentation:a
are endergonic pathways. b. release free energy. c. require oxygen. d. are also known as organismic respiration. e. are anabolic pathways.
The ________ is the federal agency that provides a majority of federal funding for medical research in the United States and oversees all federally funded medical research in the United States
A) Food and Drug Administration B) National Institutes of Health C) Environmental Protection Agency D) U.S. Department of Agriculture E) Department of Environmental Protection