A duck egg is removed from its mother’s nest and incubated by a barnyard hen. The duckling hatches out in the presence of the barnyard hen and stays in her nest. After a couple of days, the duckling is presented with a choice between its biological mother and the hen that incubated it. The duckling approaches and follows the hen. This set of observations demonstrates the phenomenon of

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#Question id: 12676

#Section 5: Applied Ecology & Evolution

Use the incomplete diagram below, illustrating some of the steps involved in eutrophication to answer the following questions.

What would be a likely entry for box B?

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#Question id: 12348

#Section 1: Ecology

The following equation represents a hypothetical relationship between fitness (w) and shoot: root ratio (r) in individuals of a plant species: w = 10r-10r2. At what value of shoot: root ratio (r), do these plants achieve maximum fitness? (Use decimal notation, not fractions or percentage)

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#Question id: 10610

#Section 2: Evolution

Among the following which statement is false about r-selected species?

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#Question id: 3483

#Section 2: Evolution

Which of the following statements about evolution of behavior is correct?

A) Natural selection will favor behavior that enhances survival and reproduction.

B) An animal may show behavior that maximizes reproductive fitness.

C) If a behavior is less than optimal, it is not completely evolved but will eventually,become optimal.

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#Question id: 8923

#Section 2: Evolution

Which of these genetic processes may be most helpful in accounting for the Cambrian explosion?