Exotic species that are introduced into a non-native habitat can ____
a. interbreed with native species
b. drive endemic species to extinction
c. die out due to competition from native species
d. blend in with endemic species
e. create habitat islands for themselves
ANSWER: b
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Rice and its grain relatives, maize, barley, and wheat, diverged from a common ancestor 50 million years ago. However, the chromosomes of these plants demonstrate extensive conserved arrangements of segments. This phenomenon is called
A. linkage disequilibrium. B. single nucleotide polymorphisms. C. contig. D. synteny. E. expressed sequence equilibrium.
Which of the following is not true about histone modification and the enzymes that create them?
A. The enzymes responsible are often part of multiprotein complexes that include transcription factors. B. The enzymes responsible can work with chromatin remodeling complexes to alter specific regions of chromatin in response to environmental signals. C. The modifications can be passed on by epigenetic inheritance. D. The enzymes responsible can create histone variants. E. All of these choices are correct.
Approximately what percent of the energy that
enters a trophic level becomes available to the next trophic level? a. 2 to 12 b. 3 to 13 c. 4 to 14 d. 5 to 15 e. 5 to 30
During his trip on the Beagle, Darwin found that ________
A) plants and animals living in temperate regions were most similar to each other, regardless of the continent on which they were found B) plants and animals living on a continent seemed more closely related to each other than to plants and animals living in similar regions on other continents C) fossils found on a particular continent were clearly not related to the plants and animals living on that continent today D) plants and animals were similar on every continent and in every type of region