All the following are the components of the ocean ecosystem except ................ .

All of the following are large ecosystems except the .................... .

Introducing rabbits into an island that is a suitable environment with much food and no enemies will lead to the environmental ...................... .

The balance among the components of the ecosystem is known as the ................. .

Cutting trees to build houses causes the environmental ....................... .

The interaction among the components of the environment is a/an .............. process.

All the following cause a disturbance to the environment balance except ......................... .

After the occurrence of environmental imbalance for a long or a short period of time, a new .................. will take place.

In the ancient eras, the ................... led to the extinction of dinosaurs.

Interaction among environmental components leads to keep the environmental ............... .

Predation relationship ................ the numbers of the preys in populations.

............... is an example of extinct animals due to the change in natural conditions in the environment.

If there were no predators, preys' populations would ............... .

Due to the shortage of food resources, the ................ appears among preys' populations.

Predation relationship plays an important role in organizing ...................... in the ecosystem.

From decomposer organisms ........................ .

Saprophytic organisms ................... the chemical elements within the ecosystem.

Without saprophytic organisms, the Earth's surface would be covered with the bodies of .................. .

Ecosystem is any natural area including living organisms like plants and non-living things like water.

Introducing new living organisms into a new ecosystem with much food and no enemies causes environmental balance.

Plants depend on the soil to get water.

Environmental balance is the balance among the components of the ecosystem.

Ecosystem may be large as the ocean.

A new balance takes place after the occurrence of an environmental imbalance for a long or a short period of time.

Interaction among the environmental components leads to the imbalance within the ecosystem.

The balance of ecosystem occurs due to the interference of man.

Changing the natural conditions leads to the environmental balance.

A disturbance in the environmental balance arises as a result of man interference.

Predation relationship keeps the balance within ecosystem.

Predators organize the numbers of preys in their populations.

When food resources in ecosystem become insufficient, a mutualism appears among preys' populations.

Lions are examples of extinct animals due to the change of natural conditions of the environment.

Within ecosystem, saprophytic organisms recycle the chemical elements that found in the bodies of dead organisms.

Without activity of saprophytic organisms, the Earth's surface would be covered with bodies of dead organisms.