Changes in populations

A Coyote eats a rabbit. The rabbit has eaten grass. Select how the flow of energy would look.

• Grass ---> Rabbit---> Coyote

• Rabbit<---- Grass<---- Coyote

• Coyote-----> Rabbit----> Grass

• Coyote<---- Rabbit-----> Grass

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Populations can change over time. For instance, if weather and climate conditions for oak trees to produce more acorns than usual then the squirrel population will _______________.

• increase

• decrease

• stay the same

• go extinct

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If the squirrel population increases then animals that are predators of squirrels, such as owls and foxes, will ___________________.

• increase

• decrease

• stay the same

• go extinct

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A ______________________ is anything that constrains a population's size and slows or stops it from growing.

• natural disaster

• population control

• restraining effect

• limiting factor

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The clownfish is protected by the sea anemone from predators, while the clownfish lures in food for the sea anemone. What type of symbiotic relationship?

• Mutualism

• Parasitism

• Commensalism

• Competition

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NGSS.MS-LS2-2

The relationship between Cheetahs and zebras in Africa depicts the predator-prey relationship. Since the zebras are a main prey of the cheetah, researchers have realized a food shortage as the cheetahs are eating too many zebras. This keeps the cheetah population in check. How does this relationship affect this populations?

• The relationship controls the population size of both species

• The predator or prey will become extinct

• The predator and prey are in competition with each other

• The predator species will grow out of control.

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What is an example of an abiotic factor? Check all that apply

• Temperature

• Animals

• Precipitation

• Plants

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What is the number of different species of plants and animals in an area

• Biodiversity

• Conservation

• Population

• Community

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Which statement BEST describes how limiting factors affect the organisms in an ecosystem?

• They destroy resources organisms need to survive.

• They provide what an organism needs to survive.

• They keep a population from getting too large.

• They have no effect on the organisms in an ecosystem.

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A disease kills most members of a predator population. What is the MOST LIKELY effect on the prey population?

• It will also be killed by the disease.

• It will decrease in size.

• It will greatly increase in size.

• It will not be affected by the change in the predator population.

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