Many Species of Field Mice Are Able to Reproduce Several

question 92

Multiple Choice

Many species of field mice are able to reproduce several times a year and produce litters with multiple offspring. However, an ecologist noted that the population size of mice, as measured in a California grassland, did not change from year to year. The factors that keep natural populations from increasing are collectively called

• A) exponential growth.
• B) nonliving factors.
• C) environmental resistance.
• D) scramble competition.
• E) biotic potential.

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