Life Science Check in Review

What happens to a population and to competition when there is a reduction of living space?

• The population expands and competition intensifies.

• Competition strengthens while the population contracts

• The population increases as competition decreases.

• Competition weakens and the population decreases

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which best determines the number of wolves that can live in an area?

• the amount of snow in the area each year

• the number of birds that live in the area

• the number of trees in the area

• the amount of food available in the area

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Kudzu vines grow by climbing and wrapping around trees. Trees covered by kudzu can die because they are starved of sunlight. What type of relationship exists between the trees and the kudzu growing on them?

• competition

• mutualism

• parasitism

• predator-prey

Tags

NGSS.MS-LS2-1

Which would indicate that a series of fossils represent the evolution of the horse?

• All of the fossils were found in the same layers of rocks as horse fossils.

• All of the fossils are completely identical to horse bones

• All of the fossils show similar structures to that of the modern horse.

• All of the fossils were located in the same place on Earth as horses.

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

What process is most responsible for the extinction of most species of plants and animals that have lived on Earth?

• gene mutation

• environmental changes

• selective breeding

• decrease in reproduction

Tags

NGSS.MS-LS2-4

NGSS.MS-LS4-1

Consider this food web:

Where is the largest amount of energy found in this food web?

• hawk

• grass

• mouse

• grasshopper

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

In a food pyramid, which best explains why the number of organisms decreases from one trophic level to the next?

• Consumers at the lower level require more energy than the top-level consumers.

• Consumers at the top level require more energy than the lower-level consumers

• The consumers are feeding on larger organisms that have less energy.

• The consumers are feeding on smaller organisms that have less energy.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Where do plants get most of the energy they need to live and grow?

• water

• soil

• air

• sunlight

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which best explains the importance of nitrogen in the cycling of energy and matter?

• Nitrogen increases protein production in plants.

• Nitrogen decreases protein production in plants.

• Nitrogen decreases the effectiveness of photosynthesis.

• Nitrogen increases the effectiveness of photosynthesis.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of these organisms is a producer in a marine ecosystem?

• fish

• gull

• algae

• worm

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3