Following their respective breeding seasons, several species of hummingbirds occur at the same locations in North America and several hummingbird flowers bloom simultaneously in these habitats. These flowers seem to have converged to a common morphology and color. Birds have the most visual sensitivity to the color red. Following their breeding season, these species of hummingbirds are
A. allopatric.
B. sympatric.
B. sympatric.
Biology & Microbiology
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Which is NOT a checkpoint in the cell cycle?
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Biology & Microbiology
The plant hormone ____ is primarily responsible for the bending of a plant shoot toward light
a. auxin b. ethylene c. systemin d. salicylic acid e. brassinosteroid
Biology & Microbiology
Which human activity is an example of hydrologic alteration?
a. overfishing b. small-scale diversion of water for agriculture c. damming of rivers d. digging wells e. desalination
Biology & Microbiology
Which level of the taxonomic classification system is the most specific?
a. domain b. order c. genus d. species
Biology & Microbiology