Ecosystems and Biodiversity

Which of the following describes how an abiotic factor can impact the population in an ecosystem?

• A parasite that invades a host can reproduce and cause a decline in the host species population.

• Organisms that compete for the same resources will keep each other from overpopulating.

• Predators will prevent herbivores from depleting the plants and other resources in an ecosystem.

• Seasonal variations in temperature can cause some of the individuals in a population to die.

Tags

NGSS.MS-LS2-4

Which of the following is a biotic factor that limits population growth of another organism?

• A forest fire

• Competition with other organisms for resources

• Pollution in the water

• Drought (greatly reduced rainfall)

Tags

NGSS.MS-LS2-1

A disease kills most of the predator population. Which of these is the most likely effect on the prey population?

• The prey will also be killed by the disease.

• The prey population will decrease in size because there are fewer predators.

• The prey population will increase in size because there are fewer predators.

• There will be no effect on the prey population.

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NGSS.MS-LS2-2

NGSS.MS-LS2-4

Corals live near the surface of the ocean in some warm regions of the world. The corals provide a home for algae. The algae, in turn, produce food that is used by the corals. Which is a biotic factor in this ecosystem?

a. The temperature of the water

b. The (salinity (salt content) of the water

c. The population of algae

d. The amount of sunlight that reaches the coral.

• The temperature of the water

• The (salinity (salt content) of the water

• The population of algae

• The amount of sunlight that reaches the coral.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which of the following is an example of a biotic limiting factor?

• Natural disasters

• Disease

• Flooding

• Temperature

What role do decomposers play in an ecosystem?

• They produce energy from sunlight.

• They control the population of predators.

• They break down dead organisms and recycle nutrients.

• They compete with herbivores for food.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

What is most likely to happen if two species compete for the exact same resources in an ecosystem?

• One species may outcompete the other, leading to a decline in the less competitive species

• The resources will increase to support both species

• Both species will thrive equally

• Neither species will be affected

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What are the three levels of biodiversity mentioned?

• Species, genetic, and ecosystem diversity

• Terrestrial, aquatic, and atmospheric diversity

• Plant, animal, and microbial diversity

• Local, regional, and global diversity

Tags

DOK Level 1: Recall

Explain why biodiversity is important for humans.

• It provides us with food, wood, fibers, energy, chemicals, and medicines.

• It reduces the number of species on Earth.

• It increases the Earth's temperature.

• It limits the availability of natural resources.

Tags

DOK Level 2: Skill/Concept

What does the term "biodiversity" stand for?

• Biological diversity

• Biome diversity

• Biochemical diversity

• Biophysical diversity

Tags

DOK Level 1: Recall