Scientists often depict their understanding of an organism's evolutionary ancestry in diagrams called ________
A) taxonomic trees
B) ancestral trees
C) phylogenetic trees
D) branchograms
E) classification trees
Answer: C
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Rainforests occupy approximately ________ of the world's land area, but represent about ________ of Earth's species
A) 7%; 50% B) 10%; 35% C) 2%; 12% D) 12%; 65%
Strains of genetically modified food crops can hybridize with wild crop varieties when
a. The process is carefully controlled in an agricultural lab. b. Pollen blows from the genetically modified crop and spreads among wild varieties. c. Pollen is transferred by the farmer from one crop to the other. d. It is not possible for a genetically modified plant to hybridize with a wild species. e. More than one of these answers is correct
Which is most dangerous to swimmers?
A. long-shore current B. rip-current C. undertow
Eras are subdivided into
A. eons B. epochs C. periods D. ages