Osmosis is best defined as the movement of
What will be an ideal response?
water molecules from a low concentration to a high concentration
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Cooksonia is a genus of very early tracheophyte plants. Unlike modern tracheophytes they only grew to a few centimeters in height. What feature provides the best explanation for their diminutive size?
A. They completely lacked vascular tissues. B. They did not have stomata. C. They consisted of only photosynthetic stems, not roots or leaves. D. Cooksonia species were not autotrophic. 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 Cooksonia? 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? 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?
Marine mammals are unable to breathe air during periods of prolonged diving. To enable such feats, in relation to their muscle physiology, they have
A. increased myoglobin concentrations. B. increased capillary densities. C. increased amounts of sarcoplasmic reticulum. D. increased expression of acetylcholine receptors. E. All of the choices for this question are correct.
What prevents knot formation in replicating DNA?
a. protosomes b. topoisomerases c. scaffolding proteins d. chromatin e. histones
Which of the following is present during meiosis but not mitosis?
A) a chromatid B) a centromere C) a spindle D) a tetrad E) sister chromatids