Examlex
What term would be used to describe the process whereby nitrogen is converted into molecules that plants can use?
Abert Squirrels
A species of tree squirrel named for Colonel John James Abert, noted for their distinctive ear tufts and dependence on ponderosa pine trees for habitat and food.
Prezygotic Barriers
Reproductive isolating mechanisms that occur before the fertilization of the egg, such as geographical, temporal, or behavioral differences that prevent species from mating.
Ecological Barriers
Physical, chemical, or biological factors in the environment that prevent species from dispersing to certain areas, limiting their distribution.
Biological Barriers
Structures and mechanisms that protect organisms from pathogens, toxins, and other external threats.
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