In combination, the products of gap genes, pair-rule genes, and segmentation polarity genes _____
A) trigger the reorganization of the larval body into an adult body
B) define the segmented body plan of the embryo
C) set up the back-to-belly axis of the larval body
D) direct cell movements during differentiation
Answer: B
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Which one of the following marine ecosystems would be expected to have the lowest species diversity and primary production per unit area?
A. oligotrophic oceans B. upwelling regions of ocean C. coral reefs D. estuaries E. intertidal zone
What happens to the carbon dioxide that is produced during the 2nd stage of aerobic respiration? a. It diffuses out of the cell
b. It is stored in the cell. c. It is converted into sugars. d. It is actively transported out of the cell. e. It moves to stage 3 and enters the Krebs Cycle.
The movement of both oxygen and carbon dioxide in the body is accomplished by:
a. exocytosis and endocytosis b. bulk flow c. osmosis d. diffusion e. facilitated diffusion
Which of the following separates the DNA strands during replication?
A) helicase B) DNA polymerase II C) ligase D) DNA polymerase I E) primase