21) If a population’s death rate 5 percent and birth : 1380991

21) If a population’s death rate 5 percent and birth : 1380991.



21) If a population’s death rate is 5 percent and birth rate is 10 percent, its r value would be:

A) 15 percent.

B) 5 percent.

C) 50 percent.

D) essentially zero.

22) Which of the following organisms represent a K-selected species?

A) whales

B) houseflies

C) grasshoppers

D) salmon


23) Which of the following is a density dependent limiting factor?

A) weather

B) rain

C) frost

D) food supply


24) Which of the following species would be classified as an opportunistic species?

A) humans

B) houseflies

C) chimpanzees

D) kangaroos


25) Mosquitoes have a short life span and produce a very large number of eggs. This is typical of a/an:

A) K-selected species.

B) equilibrium species.

C) r-selected species.

D) density dependent species.

26) Which of the following would be a characteristic of a K-selected species?

A) Most K-selected species live until older age.

B) All K-selected species live very long life spans.

C) Individuals tend to die at all ages in the life span.

D) Most die at relatively young ages.

27) Oak trees grow slowly and put a lot of resources into the trunk, bark, and roots. Seeds are relatively heavy. In the plant kingdom, oaks might be considered:

A) density independent.

B) r-selected.

C) opportunistic.

D) K-selected.


28) Humans would be typical of which survivorship curve category?

A) early-loss species

B) constant-loss species

C) late-loss species

D) late-gain species

E) early-gain species


29) Most insects would be typical of which survivorship curve category?

A) early-loss species

B) constant-loss species

C) late-loss species

D) late-gain species

E) early-gain species


30) “Life is a lottery and it makes sense simply to buy many tickets” is a strategy for organisms that exhibit:

A) K-selected growth.

B) sigmoidal growth.

C) density dependent growth.

D) density independent growth.


21) If a population’s death rate 5 percent and birth : 1380991

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