The part of the Earth where living things exist is called the __.

It is a composed of different populations of plants and animals that have common characteristics for the environment   

The part of Earth that contains the air we breathe is called the

The study of the multitude of interactions between humans and the worldaround them.

Below are organisms that may be found in a soil ecosystem. Which should be Omitted from the list?

It constitute the living organisms of the environment.

The physical environment in which the organism naturally lives

The following are factors that limit the distribution of species, EXCEPT

The basic assumptions or beliefs about ecosystems.

Which of the following is NOT an ecological principle?

An energy pyramid is used to show _________.   

These are elements such as economic, social and political elements are essentiallyman-made features, which make cultural milieu

Bacteria, legumes and lightning are part of which cycle?

Which of the following is an example of a population?

In an energy pyramid, which way does energy transfer?  

The food chain below shows

        Corn                            Bird                                    Cat

What is the recycling of chemical elements throughout the ecosystem called?

Arrange the following from least to most complex

1. organism         2. Population       3. Ecosystem      

4. Biome               5.community       6. Biosphere

What is the different about the phosphorus cycle as compared to the water, nitrogen and carbon- oxygen cycle?

Food webs different from food chains in that they