Which of the following is a structural polysaccharide?
A) glycogen
B) fructose
C) cellulose
D) starch
E) All of the above are structural polysaccharides.
Answer: C
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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?
The fact that regeneration is a common type of reproduction in sea stars suggests that
A. sea star populations have high levels of genetic diversity. B. all sea stars are haploid. C. sea stars have almost no predators. D. adult sea star cells retain the mechanism to form a complete animal.
The deuterostomes are animals whose
a. stomach is in front of the crop. b. mouth is covered by a fleshy lip. c. blastopore becomes the anus. d. digestive tract is lined by mesoderm.
Some of the high G + C Gram-positive bacteria such as Arthrobacter divide by means of snapping division.
Answer the following statement true (T) or false (F)