Unit 1 - Env - Ecological Organization

Process by which bacteria convert nitrogen gas in the air to ammonia?

Which is NOT recycled in the biosphere?

What is a biotic factor that affects the size of a population?

Algae at the beginning of a food chain are

Nitrogen fixation is carried out primarily by

What is an organism that feeds only on plants called?

All members of a particular species living in one area.

A bird stalks, kills and eats an insect.  Describe the bird.

Green plants are

The simplest grouping of more than one kind of organism in the biosphere.

The branch of biology dealing with interactions among organisms and their environment.

Which has a direct role in the Nitrogen Cycle?

What is the original source of almost all the energy in most ecosystems?

A snake eats  a frog that eats an insect that ate a plant.  What is the frog?

In a food pyramid, which organisms represent the bottom?

Combined portions of Earth in which ALL living things exist

Organisms that obtain nutrients by breaking down dead decaying plants and animals

Water flowing over land.

Each is an Abiotic Factor except

Repeated water movement from Earth's surface and the atmosphere is

An organism that cannot make its own food is called

All the interconnected feeding relationships in an ecosystem