Ecology Unit 2 Test Review 2019

If a nutrient is in such short supply in an ecosystem that it affects a plant's growth, the

What is a model of the complex interactions among organisms in a community called

The rate at which organic matter is created by producers in an ecosystem is called

What is the term for each step in the transfer of energy and matter within a food web?

What animals eat both producers and consumers?

The lowest level of environmental complexity that includes living and nonliving factors is the

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

Which is not a characteristic of all living things?

Biogeochemical cycling ensures that

Matter can recycle through the biosphere because

The base of any energy or biomass pyramid should include

Carbon cycles through the biosphere in all of the following processes except

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

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

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

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

Which is not an essential requirement of life?

All of the following are part of the water cycle except

Nitrogen fixation is carried out primarily by

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

No two species can occupy the same niche in the same habitat at the same time because of

A natural phenomenon that maintains the Earth's temperature range is

Range of physical and biological conditions in which an organism lives and the way it obtains what it needs to survive

Organisms that get nutrients by breaking down dead and decaying matter are called

What is the process by which organisms convert nitrogen gas in the air to ammonia?

A symbiotic relationship where both species benefit is

Of the 10% of energy available at each trophic level, most is used to sustain life. The rest is

The algae at the beginning of the food chain shown are

The total amount of tissue of all the organisms in a food chain is called the

The average yearly conditions of the earth's atmosphere in a particular area are referred to as the area's