Macronutrients are defined as those elements
A. required in relatively large amounts.
B. usually needed, but not always available.
C. only taken up through the soil.
D. required in certain relative amounts in the plant.
Answer: A
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Platelet-derived growth factor (PDGF) is a signaling molecule that functions in which of the following types of cell signaling?
A. juxtacrine B. paracrine C. autocrine D. endocrine E. All of these choices are correct.
During a human pregnancy, implantation occurs at which stage?
a. zygote b. early cleavage c. blastocyst d. gastrula e. embryo
In regards to altruism, what way are humans like vampire bats?
A. Their altruism is based on haplodiploidy. B. They are both Chiroptera. C. Their altruism is based on kin selection. D. They engage in reciprocal altruism. 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 altruism? 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?
A cell placed in a(n) ____________________ solution will swell
Fill in the blank(s) with the appropriate word(s).