Africanized honeybees, also called killer bees, are a concern in the Southwest. They differ from European honeybees ________

a. all of the choices
b. in that their venom is 5 to 10 times more potent
c. in that they respond more aggressively to their alarm pheromone
d. by stinging their target multiple times rather than just once


c

Biology & Microbiology

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Prevents supercoiling ahead of the replication fork

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Which protist group contains the organism Trypanosoma, a colorless parasite that can cause African sleeping

sickness? a. unikonts b. excavates c. rhizarians d. archaeplastids e. chromalveolates

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Who developed the biological species concept and recognized that speciation depends on isolation and genetic divergence acting on a pair of populations?

a. Ernst Mayr b. Charles Darwin c. Robert Hooke d. Bruce Byers e. Watson and Crick

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Which best explains why the crossing over of two homologous chromosomes occurs?

A. Sister chromatids are replicated in mitosis. B. Sister chromatids are replicated in meiosis. C. Chromosomes align closely together in tetrads during meiosis. D. Chromosomes align closely together in tetrads during mitosis.

Biology & Microbiology