What process will the meristems of the embryo use in order to grow?
a. Photolysis
b. Aerobic respiration
c. Fermentation
d. Anaerobic respiration
e. Photosynthesis
b
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Methanotrophs affect global temperature. This is because:
A. Methanotrophs metabolize methane, thereby reducing the amount of methane in the atmosphere. Since methane is one of the greenhouse gases whose accumulation causes a rise in global temperature, its reduction by methanotrophs helps prevent global warming. B. Methanotrophs convert methane to carbon dioxide and increase the amount of carbon dioxide in the atmosphere. Since carbon dioxide is one of the greenhouse gases whose accumulation causes a rise in global temperature, its production by methanotrophs contributes to global warming. C. Methanotrophs convert carbon dioxide to methane and increase the amount of methane in the atmosphere. Since methane is one of the greenhouse gases whose accumulation causes a rise in global temperature, its production by methanotrophs contributes to global warming. D. Methanotrophs convert methane to carbon dioxide, thereby decreasing the amount of methane in the environment but increasing the amount of carbon dioxide there. Since both methane and carbon dioxide are greenhouse gases whose accumulation causes a rise in global temperature, the decrease in one cancels the increase in the other and methanotrophs have no net effect on global warming. E. Methanotrophs combine carbon dioxide and methane to form petroleum and in this way take both methane and carbon dioxide out of the atmosphere. Since both methane and carbon dioxide are greenhouse gases whose accumulation causes a rise in global temperature, the decrease in both helps prevent global warming.
Which of the following is an example of solid phase bioremediation?
A) Composting B) Bioventing C) Slurry phase D) Phytoremediation E) All of the above
The spindle apparatus begins to become visible during
A) prophase. B) interphase. C) anaphase. D) metaphase. E) telophase.
A biologist uses a time machine to collect living material from two different time periods. Sample A is 3 billion years old and sample B is 1.5 billion years old. How would these samples differ?
A. Eukaryotic organisms would be present in both samples but much more common in sample B. B. Prokaryotic organisms would be abundant in sample A but absent from sample B. C. Prokaryotic organisms would only occur in sample B. D. Eukaryotic organisms would be absent from sample A.