In the spring before the leaves come out, maple trees are often tapped to collect sap to make syrup. The sugars were stored in the wood of the tree as starch and then released as temperatures rise above freezing in late winter. Which of the following tissues would contain the starch over the winter?
A. xylem
B. phloem
C. parenchyma tissue
D. collenchyma tissue
E. roots
Ans: C. parenchyma tissue
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During the citric acid cycle, one molecule of FAD is reduced to __________.
Fill in the blank(s) with the appropriate word(s).
In its travel through the human body, blood usually continues on from capillaries to enter
a. arterioles. b. venules. c. arteries. d. veins. e. other capillaries.
Fungal infections are difficult to treat because
A. they mutate very rapidly and therefore become resistant to most medications. B. fungal and human cells are so similar that it is difficult to make fungal medications that do not harm human cells. C. they "hide out" inside of cells, and have long latent periods where medications can not get to the organism. D. All of the answer choices are correct.
Which of the characteristic(s) apply to the supergroup Archaeplastida?
A. They include land plants and the green algae, Chlorophyta. B. They contain plastids that originated from endosymbiotic cyanobacteria. C. They include only multicellular organisms that contain plastids. D. They include multicellular and unicellular organisms. E. All of these apply.