A portion of a microarray is shown above in which expression of genes on human chromosome 21
was examined in either brain cells from a normal individual (cDNAs labeled with a white fluor) or
brain cells from someone with a disorder (cDNAs labeled with a black fluor).
Which genes are over-expressed in the abnormal cells compared to the normal cells?
a. A2, B1, B3, and C4
b. B2 and C1
c. A1, A3, A4, B4, C2, and C3
d. A1, A2, B2, and C1
e. A2, C2, and C4
A
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Abscisic acid (ABA) is synthesized in the roots in response to decreased soil water potential. ABA then translocates to the leaves, where it rapidly alters the osmotic potential of guard cells. What effect would this have on the stomata and the process of transpiration?
A. The stomata would open thereby increasing the rate of transpiration. B. The stomata would open thereby decreasing the rate of transpiration. C. The stomata would close thereby decreasing the rate of transpiration. D. The stomata would close thereby increasing the rate of transpiration. E. The change in the stomata would have no effect on the rate of transpiration. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about the relationship between transpiration and stomata? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach 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?
Classification. Match the following descriptions with the most appropriate group listed below.
A. Prokaryotic B. Based on fossils, oldest, still living organisms C. Unicellular organisms of considerable internal complexity D. Unicellular eukaryotic producers E. Multicellular producers F. Most common multicellular decomposers G. Multicelled mobile consumers
In contrast to most dsDNA animal viruses, the poxviruses replicate solely in the cytoplasm of the host cell. What does this suggest about the virus?
What will be an ideal response?
How does the loop of Henle enable the mammalian kidney to produce hypertonic urine?IThe ascending limb of the loop actively extrudes Na+.IIThe descending limb interacts with the ascending limb to raise the osmolarity of the extracellular fluid in the renal medulla.IIIThe concentration is further enhanced by the presence of urea, which draws water out of the collecting ducts by osmosis.
A. Just III B. II and III C. Just I D. I, II, and III E. I and II