Plants sensing chemicals in the environment is/are important to:
A. help find food
B. sense invasion by pathogens
C. sense herbivory
D. all of the above are important mechanisms for chemical reception
D. all of the above are important mechanisms for chemical reception
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Coloration in the peppered moth (Biston betularia) is determined by a single gene with two alleles showing complete dominance. Dark moths are homozygous dominant or heterozygous for the gene, light moths are homozygous recessive. In a sample of 100 moths, you determine that 64 of the moths are dark. According to the Hardy-Weinberg rule, the expected frequency of the dominant allele is ___.
A. 0.4 B. 0.36 C. 0.6 D. 0.64 E. cannot be determined Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about the Hardy-Weinberg principle? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach 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?
Why would most plants produce large numbers of seeds?
a. Most seeds are not viable. b. Most of a plants seeds are produced as food for animals that disperse the seed. c. Most plants have many flowers. d. Most plants only flower once e. Few seeds survive, germinate and grow into mature individuals.
One of the reasons that intermediate filaments have strength is the same reason that bipolar fibers of myosin II have strength.
a. true b. false
Which of the following statements is false?
a. Enzymes are highly specific and act on chemicals called substrates. b. Enzymes act as catalysts and speed up chemical reactions within cells. c. Most enzymes work best under high salt conditions. d. Most enzymes are proteins. e. Enzymes can become deactivated by high fevers