To replace fossil fuels, the world must find a way of producing fuel from renewable energy. One of the most promising fuels of the future is hydrogen, which could potentially be produced in algae using the power of sunlight. Green algae contain enzymes (hydrogenases) that can convert hydrogen ions (H+) and electrons to hydrogen gas (H2). The hydrogen ions used by the hydrogenase come from
A. organic sugars.
B. ATP.
C. rubisco.
D. ATP synthase.
E. water.
Answer: B
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Essay on the Principle of Population, written by Thomas Malthus in 1798, influenced Darwin's thoughts as he struggled to understand what mechanisms could be at work to produce evolution. Malthus proposed that populations of animals and plants, including humans,
A. evolved from mainland to islands, thus explaining why the island flora and fauna resembled the mainland species so closely. B. decreased arithmetically in numbers while the nutrients available increased geometrically. C. increased arithmetically in numbers while the nutrients available only increased geometrically. D. increased geometrically in numbers while the nutrients available only increased arithmetically. E. increased geometrically in numbers while the nutrients available increased arithmetically.
Herbicide resistance and Bt genes from GMO
crops are now commonly found in weeds. This is an example of
a. genetic drift. b. the bottleneck effect. c. gene flow. d. the Red Queen effect. e. disruptive selection.
When cytokinins are sprayed on leaves of a cut stem, the leaves become, or remain, yellow. Indicate whether the statement is true or false
Bacteria divide through a process called binary fission
Indicate whether the statement is true or false