If the frequency of one allele in a population is 0.7 in a population with two alleles at a particular locus, what is the frequency of the alternate allele?
A) 0.09
B) 0.21
C) 0.30
D) 0.42
C
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Plants maintain higher levels of phytochrome at their growing tips where phytochrome plays important roles in growth responses to light. Phytochrome levels are also high in areas of the plant that are "greening". What does this suggest about the role of phytochrome in these "greening" zones?
A. Phytochrome is absorbing green wavelengths of light. B. In these areas, phytochrome is the first step in the electron transport chain of photosynthesis. C. Phytochrome is facilitating the transcription and translation of photosynthesis related proteins. D. Phytochrome is facilitating the migration of chlorophyll pigments from other areas of the plant. 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 role of phytochrome in plants? 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?
Density-independent factors are abiotic.
Indicate whether the statement is true or false
If you were shipping green bananas to a supermarket thousands of miles away, which of the following chemicals would you want to eliminate from the plants' environment?
A) carbon dioxide B) cytokinins C) ethylene D) auxin E) gibberellic acids
Tetrodotoxin is a potent poison, produced by some newts, pufferfish, and blue-ringed octopus that affects sodium transport involved with the voltage gates in neurons. A friend swimming in the Caribbean is pricked by a pufferfish and gets very sick. The most likely action the poison takes is
A. Mimicking a symporter and allowing sodium to rush out and potassium to rush in. B. Mimicking an antiporter and allowing sodium to rush out. C. Blocking an antiporter so sodium cannot rush in. D. Blocking a symporter and keeping sodium from rushing in. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about the effects of tetrodotoxin on ion movement in neurons? What other information is related to the question? 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?