If populations within the same area split into species, the process is known as
A. racial speciation.
B. allopatric speciation.
C. sympatric speciation.
D. ecotypical speciation.
E. reproductive speciation.
Answer: C
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This type of RNA is typically found as a strand about 75?90 bases long that folds into a structure with
four double-helical segments.
a. snRNA b. pre-mRNA c. rRNA d. tRNA e. mRNA
Canadian researchers reported that ovenbirds exposed to the noise of compressors used in the gas and oil industry ________
a. fled the area b. raise fewer offspring c. have permanent hearing loss d. have stopped singing
Researchers have found that mixtures of phospholipids placed in water or salt solutions tend to spontaneously form:
A. RNA molecules. B. DNA molecules. C. ATP. D. small spherical units that resemble living cells.