Ecosystems and Food Webs Quiz

Which one of these best describes a relationship where both kudzu and another organism benefit?

• Decomposer organisms recycle the dead leaves and increase their population.

• Consumer organisms eat the leaves and gain nutrients.

• Insects spread the pollen and consume the nectar.

• Trees provide a structure for the vines to grow on.

According to the text, what did the scientists most likely discover was the cause of the Sea Otter Species population decrease?

• A parasite in the area caused the population to decrease.

• The lack of resources led to competition for and inadequate supply of resources.

• Lack of sunlight causing competition for and inadequate supply of resources.

• The increase in oil presence caused the population of sea otters to decrease.

Which of the following is a biotic factor?

• Fungi

• Sunlight

• Water

• Temperature

Identify if the following factors are abiotic or biotic. Put a check in the proper column (abiotic or biotic) to the right of each factor.

• Biotic

• Abiotic

Of the consumers listed, which one is the highest in the food chain?

• Snakes

• Foxes

• Decomposers

• Hawks

What do the arrows in a food chain indicate about the flow of energy in an ecosystem?

• Energy is continuously recycled by the organisms in an ecosystem.

• Energy flows in one direction in an ecosystem, from producers to consumers.

• Organisms at the end of the food chain receive more energy than those at the beginning.

• More of the available energy in an ecosystem is given to large animals than to small animals.

Which of the following is an example of a biotic factor that would limit the size of a deer herd?

• populations of predators

• lack of oxygen at high altitudes

• heavy winter snowfalls

• severe summer drought

What is the relationship between the frogs and insects?

• Predator/Prey

• Parasite/Host

• Consumer/Producer

Which of the following is an example of an abiotic factor?

• Mushroom

• Sand particle

• Tree branch

• Oak tree

One year, a parasite infects squirrels and significantly reduces the squirrel population. What effect is a decrease in the population of squirrels most likely to have on the hawk population?

• Hawk population will not change significantly.

• Hawk population will decrease significantly.

• Hawk population will increase significantly.