Methanotrophs affect global temperature. This is because:
A. Methanotrophs use oxygen produced by plants to 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.
A. Methanotrophs use oxygen produced by plants to 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.
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The process of carbon dioxide fixation refers to
A. reaction of carbon dioxide with water to form carbonic acid. B. release of carbon dioxide during catabolic reactions. C. reduction of carbon dioxide and incorporation into organic molecules that are assimilated. D. release of carbon dioxide during anabolic reactions.
You are a doctor who examines a swollen and warm puncture wound on the hand of a patient. Next door, a vet examines the same puncture wound on the foot of a dog. Are you and the vet seeing the same immune responses?
A. Yes, because dogs have innate immune systems but not adaptive immune systems. B. Yes, because dogs have adaptive immune systems but not innate immune systems. C. No, because the immune response is unique to humans. D. Yes, because vertebrates have both adaptive immune systems and innate immune systems. E. No, because the foot of a dog is a completely different structure than the hand of a patient.
In cases where a perpetual "arms race" occurs between biological antagonists, such as parasites and their hosts, sex is favored because it reduces linkage disequilibrium by recreating missing genotypes in an oscillating fashion
This hypothesis is called the ________ [two words] hypothesis. Fill in the blank(s) with correct word
Which of the following does NOT occur during the latent period of muscle contraction?
a. Myosin heads bind to actin filaments. b. Myofibrils shorten. c. Muscle cell membrane initiates an electrical impulse which travels into the muscle cell. d. Calcium is released from the sarcoplasmic reticulum. e. all of these