​A Population Ecologist Wants to Estimate the Size of a Robin

question 79

Multiple Choice

​A population ecologist wants to estimate the size of a robin population. In an apple orchard, she captures 10 robins, marks them, and then releases them. She returns several weeks later and captures another 10 robins, of which 2 are robins she previously marked. The estimated population size of robins is ____.

• A) ​50
• B) ​15
• C) ​10
• D) ​200
• E) ​20

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Definitions:

Altruism

The selfless concern for the well-being of others, often leading to acts of kindness without expectation of reward.

Helping Behavior

is actions intended to aid or benefit another person or group without expectation of reward for the self.

Voluntarily

Done, made, or provided out of free will, without coercion or obligation.

Anticipation

The action of expecting or predicting something to happen in the future.