Grade 7 PREP Chapter 6 Interactions Within Ecosystems

Which animal eats snakes?

• fox
• buzzard
• dragonfly
• titmouse

A tick attaches to a dog and fills up with the dogs blood.This is harmful to the dog. How is this interaction classified?

• mutualism
• commensalism
• predation
• parasitism

What two species are in competition for mice as a food source?

• buzzard and plantain
• rabbit and titmouse
• buzzard and fox
• snake and frog

True or False: ALL producers use photosynthesis to produce food energy.

• true
• false

If a species exceeds the carrying capacity of an environment, which of the following describes the area?

• overpopulated
• extinct
• populated less densely
• all of the above

When people started to develop and use water-saving technologies in the Ogallala Aquifer area, which of the following occurred?

• They stopped using water faster than it could be replaced
• They actually began replacing water in the aquafer
• The rate of water usage changed from 1.3 to 3 m per year
• The rate of water usage changes from 3 m to 1.3 m per year

What is the carrying capacity of a habitat?

• The combined mass of all of the organisms in the habitat
• the largest number of individuals of one species an ecosystem can support over time
• the amount of water vapor the atmosphere can hold before it rains
• none of the above

Which of the following is a biotic factor?

• sunlight
• worms
• water
• climate

Which statement is true?

• Extinction of a population in an area can benefit any other species in that area.
• Extinction of one population of a species does not mean ALL of the individuals of that species
• If a plant-eating species became extinct from an area, other plant eaters would have less food resources available.
• If a plant-eating species became extinct from an area, the predators of that species would increase in population.

True or False: Nitrogen, as it is found in the air, can be used by plants and animals.

• true
• false