Intro to Ecology

The relationship between a whale and barnacles growing on it's skin is an example of 

Animals that eat both producers and consumers are called

Process in which some bacteria convert fixed nitrogen back into nitrogen gas.

Which of the following organisms does not require sunlight to live?

Simplest ecological model of the feeding relationships among organisms in a community.

The term for each step in the transfer of energy and matter within a food web.

All the interconnected feeding relationships in an ecosystem.

Plants are considered

All of the members of a particular species that live in one area are called a(an)

Organisms that obtain nutrients by breaking down dead and decaying organisms are called

A snake eats a frog that has eaten an insect that fed on a plant is called

The combined portions of the Earth in which living things exist. ( 8 km up to 11km down)

An organism that cannot make their own food.

Matter can recycle through the biosphere because

Type of pyramid that shows the amount of living tissue at each trophic level in an ecosystem.

Nitrogen fixation is primarily carried out by...

Branch of biology dealing with interactions between organisms and their environment is called

Cougars are predators that often eat the weakened or diseased animals. What was described?

What is the process called when bacteria convert nitrogen gas in the air to ammonia?