The theory that earthquakes, floods, and other natural disasters cause extinctions of some species while leaving others unharmed is ________
Fill in the blank(s) with correct word
catastrophism
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The human immunodeficiency virus (HIV) uses RNA, rather than DNA, to encode genetic information. During infection, however, HIV uses an enzyme known as reverse transcriptase to generate double-stranded DNA. Generally speaking, how would the enzyme generate a double strand of DNA from a single strand of RNA?
A. Reverse transcriptase first catalyzes the synthesis of a DNA copy from the viral RNA, and then catalyzes the synthesis of a second strand of DNA complementary to the first one. B. Reverse transcriptase first catalyzes the synthesis of a RNA copy from the viral DNA, and then catalyzes the synthesis of a second strand of DNA complementary to the first one. C. Reverse transcriptase first catalyzes the synthesis of a DNA copy from the viral RNA, and then catalyzes the synthesis of a second strand of DNA from the viral RNA.
Genetic testing (select all correct choices):
A. will identify every allele of every gene you carry. B. will tell you whether or not you will contract breast cancer or Type II diabetes. C. will identify some alleles of some of your genes. D. will identify every risk factor you have for the most common types of cancer as well as for cardiovascular disease. E. none of these.
What is significant about the findings from "split brain" patients studied by Roger Sperry and his collaborators?
A. These studies revealed that the right and left hemispheres both function primarily to enable people to understand and produce language. B. These studies revealed that the right and left hemispheres both function primarily to enable people to describe qualities of objects such as shape and texture. C. These studies revealed that the left hemisphere functions primarily in understanding and producing language while the right hemisphere functions instead in describing qualities like shape and texture. D. These studies revealed that the right hemisphere functions primarily in understanding and producing language while the left hemisphere functions instead in describing qualities like shape and texture.
The total length of the cell cycle of cells in a cell culture is 24 hours. M phase is found to be 1 hour, S phase is found to be 9 hours and G2 is found to be 4.5 hours. How long is G1?
a) 24 hours b) 9.5 hours c) 9 hours d) 1 hour e) 4.5 hours