Question

Q1.22. The industrious beaver is a good example of a central-place forager. Given this, which of the following statements is most likely to be true? During the mating season, beaver travel to centralized meadows where they compete for mates. A colonial species, numerous beaver families will each build a lodge on the edge of a central pond. All beaver in an area forage for aquatic plants that grow in a single, centralized location. Beaver venture out from their lodges to collect plant matter, returning to store this food in or near the lodge. Q1.23. Late each summer, migrating rufous hummingbirds stop in Arizona, where they establish and defend territories. Larger territories contain more flowers, provide more energy in the form of nectar, and are harder to defend. Researchers Astrid Kodric-Brown and James Brown developed a cost- benefit model to help explain observed variation in territory size (S). A modified version of their model is shown to the right. Based on this model-and assuming optimal behavior-how large an area should a hummingbird defend (referring to labels on the x-axis)? S: S2 S; S4

Answer 1

1.22 Ans: The correct option is D.

Beavers venture out from their lodges to collect plant matter, returning to store this food in or near the lodge.