Ecosystem, human body, genetics quiz 5th

Which type of animal usually eats both producers and consumers?

• an omnivore

• a carnivore

• a herbivore

• a predator

Which has the greatest effect on the amount of salt in a salt marsh?

• the number of animals living in the marsh

• the closeness of the marsh to the ocean

• the depth of the water in the marsh

• the temperature of the water in the marsh

What will be most affected if the decomposers in an ecosystem are removed?

• the spread of disease

• the availability of water

• the quality of soil

• the distribution of organisms

This is a food chain that includes grass, a grasshopper, and a bird. How is the grass in this food chain best described?

• It is a producer, because it makes its own food.

• It is a producer, because it is eaten by consumers.

• It is a consumer, because it gets energy from producers.

• It is a decomposer, because it breaks down sunlight.

Which would most likely cause a decrease in a population of herbivores?

What would most likely result if all plants in an area were destroyed?

What would most likely happen if all of the decomposers in an ecosystem were removed?

• The animals in the ecosystem would die because of the spread of disease.

• The plants in the ecosystem would eventually die because of a lack of nutrients in the soil.

• The plants in the ecosystem would begin to die out because of a decrease in available water.

• The animals in the ecosystem would eat other types of food because of a decrease in producers.

Which of the following is an example of a decomposer in a forest ecosystem?

• Oak tree

• Wolf

• Mushroom

• Deer

What would likely happen to the soil quality if decomposers were removed from an ecosystem?

How do carnivores affect the population of their prey?

• Increase it by hunting less frequently

• Decrease it through predation

• Increase it by providing food

• No impact

Answer explanation

Carnivores affect the population of their prey by decreasing it through predation, as they hunt and consume the prey animals.