SB2A

What do tropisms NOT allow a plant to do?

• respond to light

• respond to gravity

• respond to water sources

• respond to sound

Look at the image

• gravitropism

• phototropism

• thigmotropism

• rapid response

Tags

NGSS.MS-LS1-5

Alligators will use their powerful feet, tail, and snouts to dig a hole through the mud, producing small ponds known as "alligator holes." Many other species benefit from alligator holes. During the dry season, fish, turtles, and other aquatic animals live in the alligator holes. Birds, terrestrial animals, and plants use these holes as a source of water. What term best describes the role of alligators in this ecosystem?

• invasive exotic species

• keystone species

• producer

• primary consumer

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Which is NOT an abiotic limiting factor?

• too much water

• too high temperature

• insufficient nutrients

• population overcrowding

Which of the following is an example of a density-dependent limiting factor?

• temperature

• predation

• oxygen supply

• an earthquake

Tags

NGSS.MS-LS2-4

The graph provided shows the population of an organism introduced to a new environment, as well as how the population changed over 60 days. After the sharp rise, there was a leveling off of the population. What does this indicate?

• The life expectancy of the organisms in this population is about 30 days.

• This environment has only enough resources to support 250-300 individuals of this species.

• This organism needs 30 days to reach maturity before it can reproduce.

• This species is unable to reproduce in any habitat beyond a population of around 300 individuals.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which of the following observations would lead to the classification of gopher tortoises as a keystone species in Georgia? Gopher tortoises–

• create habitats for hundreds of other species by digging underground burrows.

• maintain a diet that consists of a variety of native grasses, fruits, and legumes.

• can only reproduce at a rate of about six hatchlings every 10 years.

• live in forested regions where plenty of sunlight can reach the forest floor.

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Which of the following would be a limiting factor affecting the population of Gasterosteus aculeatus?

• The average incubation period of three-spined stickleback eggs

• The population of similar organisms in nearby habitats

• The volume of water in the body of water in which the fish lives

• The seasonal variation in the amount of daylight

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The populations of four species introduced into a new ecosystem are plotted on the graph provided.<\/p>

Which species reached carrying capacity first?<\/p>

• Species 1<\/p>

• Species 2<\/p>

• Species 3<\/p>

• Species 4<\/p>

Tags

NGSS.MS-LS2-1

The maximum number of organisms an ecosystem can support

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4