__________ are tetrapods that live on land but
typically return to water to reproduce. Fill in the blank(s) with the appropriate word(s).
Answer: Amphibians
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A rise in sodium levels and extracellular volume
leads to a rise in blood pressure. As a result, a. renin levels rise, but aldosterone levels fall. b. renin levels fall, but angiotensin levels rise. c. renin and aldosterone levels all rise. d. renin and aldosterone levels all drop. e. none of these occur.
“Bt corn” are corn plants that contain a bacterial gene for the bacterial toxin, Bt. The production of this toxin kills
insects that feed on the plant, thereby making the plants pest-resistant. This process is an example of: a. bioengineering. b. genomic studies. c. fluorescent GloFish. d. recombinant DNA technology. e. genetic engineering
Due to a rapid change in the environment, a population of ants was reduced from one million to one thousand. What
type of genetic drift will occur in the gene pool of this population when it expands again? a. gene flow b. migration c. natural selection d. the founder effect e. a genetic bottleneck
Characid fishes are found naturally only in South America and Africa. Fossils of these fish are not found on any other continents. What is the most likely explanation of this distribution pattern?
A) These fishes arose in either Africa or South America and migrated across the South Atlantic Ocean to the other continent. B) Characid fishes arose prior to the separation of the African and South American continents. C) Characid fishes arose in the South Atlantic Ocean and migrated to Africa and South America. D) Convergent evolution is responsible for the distribution of characid fishes.