Ecological Change Test Review

Which is a characteristic of primary succession?

• soil is present at the beginning of an ecosystem

• bare rock and sand dunes are 2 examples of locations of this succession

• grasses are the pioneer species

Which of the following is an example of how soil develops in primary succession?

• lichens and mosses break down rocks

• animals cut open rocks with their teeth and claws to break them down

• fires destroy rocks which break them down

Old-field succession occurs when farmland is abandoned. This is an example of _______ succession.

• primary

• secondary

• tertiary

Climax communities are always reached in succession.

• True

• False

The longer ecosystems are around, the ________ biomass (organisms) is present.

• more

• less

• same

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

8. These bell peppers are different colors which is caused variations in DNA. Which level of biodiversity is represented by this picture?

• species

• genetic

• ecosystem

Tags

NGSS.MS-LS4-4

NGSS.MS-LS1-5

When a species disappears from an ecosystem, what happens to the food web?

• it does not change

• another organism takes it place

• a strand in the food web is removed

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-3

________ is a species that is critical to the functioning of an ecosystem because it affects many other species in the habitat.

• keystone species

• endemic species

• indicator species

Tags

NGSS.MS-LS2-4

Genetic variation in a population is good because it DECREASES the chances of survival during environmental changes.

• True

• False

Tags

NGSS.MS-LS4-4

Which is a human benefit for biodiversity?

• agricultural use

• industrial use

• medical use

• all of the answer choices

Tags

NGSS.MS-LS2-5