LS 2.1

Examine the diagram that shows a pond and several organisms that live in it. A flock of geese migrates to the pond. Which statement describes a possible negative effect of this migration on the pond environment?

• The geese will bring new resources to the pond.

• The population density will increase.

• The pond will flourish due to the addition of a new species.

• The population density will decrease.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Examine the graph. What is represented by the dashed line on the graph?

• death rate

• carrying capacity

• birth rate

• emigration maximum

Tags

NGSS.MS-LS2-4

Over time, a rabbit population reaches its carrying capacity. Which factor would cause the carrying capacity to decrease?

• a decrease in the number of predators

• an increase in the amount of water available per rabbit

• a decrease in the amount of food available per rabbit

• an increase in the amount of shelter

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which relationship represents an example of mutualism?

• an owl and a snake feeding on rats

• a lynx hunting a snowshoe hare

• an ant colony living on an acacia tree and not allowing vines to grow on the bark

• a tapeworm absorbing nutrition from the intestines of a host organism

Tags

NGSS.MS-LS2-2

The graph shows the population of honeybee colonies from 1935 to 2015. What is a reasonable explanation for the trend in the population of honeybee colonies?

• The death rate of the honeybee population is equal to its birth rate.

• The honeybee population experienced an increase in food resources.

• The death rate of the honeybee population is greater than its birth rate.

• The honeybee population experienced a decrease in the number of infections.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The image shows a male peacock spider lifting two of its legs and its colorful tail flap up in the air. Why does a male peacock spider display this kind of behavior?

• to warn other spiders about predators

• to attract suitable mates

• to get rid of excessive heat from its body

• to hook and catch its prey easily

Tags

NGSS.MS-LS1-4

Two organisms of different species exist in a relationship in which each individual benefits from the activity of the other:

• herbivory

• mutualism

• commensalism

• parasitism

Sloth's and monkeys share the same tropical habitat. Deforestation is occurring limiting the space for these 2 species. What will now occur between the 2 species?

• Commensalism

• Competition

• Mutalism

• Predation

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

In a forest ecosystem, deer and rabbits both feed on the same type of grass. What type of ecological relationship do they share?

• commensalism

• competition

• mutualism

• parasitism

Which factor would most likely lead to an increase in the carrying capacity of a wolf population in a forest?

• a decrease in the amount of available water

• an increase in the number of prey animals

• a decrease in the amount of shelter

• an increase in the number of predators

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4