Population of ground squirrels has an annual per capita birth rate of 0.06 and an annual per capita death rate of 0.02) Estimate the number of individuals added to (or lost from) a population of 1,000 individuals in one year.

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#Question id: 10670

#Section 1: Ecology

To estimate the number of foxes in an area, a researcher conducted a mark-recapture survey. In the first survey, he caught and marked N number of foxes. In his second survey a week later, he caught 120 foxes of which 90 were unmarked (recaptures). If you are told that the actual number of foxes in this area is 400, what is value of N in this area?

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#Question id: 3291

#Section 2: Evolution

Which of the following is the most predictable outcome of increased gene flow between two populations?

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#Question id: 10823

#Section 1: Ecology

Which of the following statements about symbiotic relationships is true?

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#Question id: 9204

#Section 5: Applied Ecology & Evolution

Which of the following observations provides the best evidence of a biodiversity crisis?

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#Question id: 11980

#Section 1: Ecology

 A female cat in heat urinates more often and in many places. Male cats congregate near the urine deposits and fight with each other. Which of the following is a proximate cause of this behaviour of increased urination?