Lecture Exam 4

In the sigmoid growth curve, the carrying capacity of the environment is indicated by what symbol?

• ri

• N

• K

• N/K

Tags

NGSS.HS-LS2-1

Many times species are composed of networks of distinct populations called metapopulations. When do metapopulations occur?

• When a population is large and uniformly distributed.

• When a population in poor habitat continually sends out dispersers to bolster populations in better habitats.

• When a population in a better habitat does not send out colonizers into less suitable habitats.

• When suitable habitat is patchily distributed and separated by areas of unsuitable habitat.

Parental care of the young is usually associated with species with a type ___ survivorship curve.

• I

• II

• III

• IV

Which survivorship curve type is represented by Humans?

• I

• II

• III

• I or II (depending on the sex ratio)

Which is an example of a density-independent factor on a population?

• weather

• nesting sites

• intraspecific competition

• amount of prey

Tags

NGSS.HS-LS4-5

What do we call populations of organisms that are usually near the carrying capacity?

• K-selected

• r-selected

• predators

• parasites

Tags

NGSS.HS-LS2-1

Which of the following statements about the graph is true?

• A. Oysters live longer than Hydra.

• B. Hydra and humans have parallel life spans.

• C. Humans and oysters have similar life spans.

• D. Humans have low mortality rates early in life.

Insects that lay eggs on living hosts are called

• ectoparasites.

• endoparasites.

• parasitoids.

• predators.

All organisms living together in a place are called a

• community

• population

• species

• ecosystem

A species that plays a critical role in maintaining the structure of an ecological community and helps to determine the types and numbers of various other species in the community is known as

• a predator

• a keystone species

• the primary species

• the dominant species.

Tags

NGSS.MS-LS2-4