Ecology

A series of predictable changes in an ecosystem over time

Green plants are

What is the process by which bacteria convert nitrogen gas in the air to ammonium?

Living organisms require nitrogen to make_?_, which are used to build proteins.

Type of ecological succession which occurs where there hasn't been colonization before (on rock, after volcano eruption)

The organisms in the ocean with the smallest total biomass are the most likely

Biome with aromatic herbs (sage,thyme,oregano) as well as shrubs, acacia, and grasses; hot/dry summer&cool/moist winter

Nitrogen fixation is carried out primarily by

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

Carbon cycles through the biosphere in all ofthe following processes EXCEPT:

Branch of biology dealing w/ interactions among organisms & between organisms their environment

This biome is known for receiving very little rainfall and extreme temperatures from day to night

Only about 10% of the energy stored in a trophic level is passed to the next level, the rest is

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

The amount of sunlight a region receives depends on its

Scientists classify the nitrogen, carbon, and water cycles as:

A type of symbiotic relationship in which both species benefit

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

What are the steps in the movement of energy, or an organism's feeding status in an ecosystem called?

The combined portions of Earth in which all living things exist is called....

 This biome goes through 4 seasons and consists of moderate climate, broadleaf trees such as oak & maple; shrubs, herbs

Organisms need nutrients in order to

The chemical substances that an organism requires to live are called:

The repeated movement of water between Earth's surface and the atmosphere is called

An organism using energy to produce its own food from sunlight's energy is called a(n)

A group of ecosystems that have the same climate and dominate communities is called a(an):

Movements of energy & nutrients through living systems are different because

An organism that cannot make its own food so it must rely on eating organisms for energy is called a(an)

The simplest grouping of more than one type of organism in the biosphere is a(n)

Only about 10% of the __?__ in a trophic level is available to organisms at the next level.

All the interconnected feeding relationships in an ecosystem make up a food

Water can enter the atmosphere through the process of evaporation and

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

What animals eat both producers and consumers?

Plant eating animals such as cows are called

What is an organism that feeds only on plants called?

Which of the following descriptions about the organization of an ecosystem is correct?