Parental Care - Animal Behavior

In what sense is the male hangingfly's gift of a fly to his mate rather like parental investment, even if the female does not use the fly to help her produce larger or better eggs?

A) The time and energy spent capturing the gift reduce the male's future potential reproductive output.
B) The gift may be used to increase the number of eggs the female produces.
C) The gift makes it more likely that that male will have offspring in the future.
D) The consumption of the fly means the female may live longer, just as parental investment results in parents living longer.

Answer

Question 2

(Multiple Choice)

Free

The Trivers-Willard hypothesis primarily attempts to explain

A) variation in the sex ratio of offspring.
B) parent-offspring conflict.
C) siblicide and infanticide.
D) the decline in reproductive output with age.

Answer

Question 3

(Multiple Choice)

Free

Ghalambor and Martin (2001) found that a North American species of thrush placed higher value on their current nest full of offspring than did a similar South American species. This differential response is due to

A) a more abundant food supply in North America.
B) South American birds generally living longer than those in North America.
C) South American birds generally laying only one egg per nest.
D) higher parasitism rates in North America.

Answer