Ecosystem Test Review

Which statement describes a situation in which abiotic factors would limit the growth of a population?

• Predators are removed from the area.
• Animals spread a new disease through a population.
• Water and mineral resources are depleted in an area.
• Competition for limited food intensifies after an exotic species is introduced.

Ecosystem is the level of organization that is best described as –

• A group of organisms of one type that live in the same area.
• Populations that live together in a defined area.
• A community and its non-living (abiotic) surroundings.
• An individual living thing.

What examples of biotic factors interacting with abiotic factors are shown in this ecosystem? (select TWO)

• The tree absorbing water from the ground.
• A fish eating an organism from the water.
• A beaver using rocks to build a dam.
• The rock being heated by the sun.

What examples of biotic factors interacting with abiotic factors are shown in this ecosystem? (select TWO)

• The tree absorbing sunlight to make food.
• The frog sitting on the lily pad.
• Termites laying eggs in the dirt mound.
• The rock being heated by the sun.

A living or once living part of an ecosystem.

• biotic factor
• abiotic factor

Which of these is an example of a biotic factor that could limit the population of a community in an ecosystem?

• A drought occurs for several months.
• New predators move into the ecosystem.
• A hailstorm passes through the ecosystem.
• Living space is lost due to human activities.

What level of organization in an ecosystem is an individual plant or animal?

• population
• organism
• community
• ecosystem

A mistletoe plant grows on a tree, absorbing nutrients and water from the tree. Eventually, the mistletoe stunts the growth of the tree. What type of relationship does this describe?

• predation
• mutualism
• commensalism
• parasitism

Which of the following describes an interaction between a biotic factor and an abiotic factor?

• A vulture eats the remains of a wild pig
• A squirrel gathers nuts to store for winter
• A black bear uses a cave for a winter home
• A pair of birds build a nest in a tree

A non-living part of an ecosystem.

• biotic factor
• abiotic factor