Which of the following is a primary difference between ectomycorrhizae and endomycorrhizae?
A) Endomycorrhizae have thicker, shorter hyphae than ectomycorrhizae.
B) Ectomycorrhizae do not penetrate root cells, whereas endomycorrhizae grow into invaginations of the root cell membranes.
C) Endomycorrhizae are more common than ectomycorrhizae.
D) There are no significant differences between ectomycorrhizae and endomycorrhizae.
B
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Which of the following enzymes catalyzes the elongation of a new DNA strand?
A) RNA polymerase B) DNA ligase C) reverse transcriptase D) DNA polymerase
The chambers and valves of the heart are lined by the
A) pericardium. B) myocardium. C) endocardium. D) erythrocytes. E) vena cava.
True or False: A small, local population of organisms is very sensitive to drastic environmental changes, but is unaffected by predation
A. true B. false
A student set up an experiment to test if plants give off water vapor. Fifty pea plants, growing in pots, were covered with individual glass containers and left overnight. The next morning, the inside of each lid was covered in droplets of water. The lab student concluded that plants generally give off water vapor. What critique would you make of the experimental design?
A. There was no control so the water could have come from other sources such as air in the jar or the soil. B. There was not a large enough sample of pea plants used to get adequate data. C. The student did not have a clearly stated hypothesis before beginning the experiment. D. The experiment was not precise, meaning it was not reproducible. Clarify Question 1. What is the key concept addressed by the question? 2. What type of thinking is required? 3. What key words does the question contain and what do they mean? Gather Content 1. What do you know about experimental design? How does it relate to the question? Consider Possibilities 1. What other information is related to the question? Which information is most useful? 2. What other information is related to the question? Which information is most useful? Choose Answer 1. Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process 1. 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?