The age-structure diagram above would be typical for what country?
(A) United States
(B) Canada
(C) Mexico
(D) Germany
(E) Japan
- Why is territoriality an adaptive behavior for songbirds maintaining
populations at or near their carrying capacity?
(A) Because songbirds expend a tremendous amount of energy defending
territories, they spend less time feeding their young and fledgling
mortality increases.
(B) Only the fittest males defend territories, and they attract the fittest
females; therefore, the best genes are conveyed to the next generation.
(C) Songbird males defend territories commensurate with the size from
which they can derive adequate resources for themselves, their mates,
and their chicks.
(D) Many individuals are killed in the ritualistic conflicts that go along with
territorial defense.
(E) Songbirds make improvements to the territories they inhabit so that they
can all enjoy larger clutches and successfully fledged chicks.
