Ecology & Population Density

Population density is the

• number of individuals per unit of area.

• ratio of one species to the total number of species.

• total number of populations in an area.

Which of the following does not increase biodiversity?

• high food availability

• abundant resources

• surge in one specific population

Tags

NGSS.MS-LS2-5

This is the process where the flow of carbon dioxide and oxygen has been disrupted by uncontrolled growth of algae.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

In a lake fully covered with dead algae, which is a limiting factor for fishes to grow their population?

• too much carbon dioxide

• other fishes

• fresh algae

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

These are factors that limit the growth of a population.

Tags

NGSS.MS-LS2-4

When birthrate is higher than death rate, population ___________.

• grows

• shrinks

• declines

When a robin emigrates to look for new nesting place, the population it left will ________.

• increase

• shrink

• grow

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

___________ is the amount of variation in an ecosystem.

Tags

NGSS.MS-LS2-5

As populations vary, the biodiversity of an area changes.

• True

• False

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Give one human factor that can cause change in the biodiversity of an area.

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-1