____ in the figure diagram above represent consumers.
A. Only the plants
B. Only the insects
C. Everything except trees
D. Spiders, frogs, fish, and humans
C. Everything except trees
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Soil erosion is caused by ________
a. overgrazing or deforestation only b. all of the choices c. strong winds only d. moving water only
Pseudogenes are evidence of
A) gene duplications. B) integrated viruses, or proviruses. C) natural selection for functional genes. D) de novo genes. E) proteins that are produced but have no function.
Fuels used in cars, and the carbon dioxide cars emit, were originally carbon dioxide
A. fixed by vascular and nonvascular plants during photosynthesis about 300 mya. B. fixed in the tissues, decayed from dinosaurs after the Cretaceous mass extinction. C. released from volcanoes, and accumulated over centuries. D. trapped in rocks and compressed into oil and coal, during the Precambrian. E. trapped in the ocean and secreted into large coral reef structures, during the Mesozoic.
What type of mutation would prevent both alleles of a gene from being expressed?
a. dominant b. recessive c. trans-acting d. cis-acting e. None of the above