Life Science/CP Bio Chapter 3

Which type of pyramid shows the amount of living tissue at each trophic level in an ecosystem?

Nitrogen fixation is carried out primarily by

Organisms need nutrients in order to

process by which water changes from a liquid into an atmospheric gas

process of converting nitrogen gas into ammonia

organism that obtains energy by eating only plants

group of individuals of the same species that live in the same area

chemical substance that an organism requires to live

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

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

an increase in the amount of algae & producers because of a large input of a limiting nutrient

organism that obtains energy from the foods it consumes

organism that breaks down, feeds on, and obtains energy from dead organic matter (dead animals)

step in a food chain or food web

process by which some organisms, such as bacteria, use chemical energy to produce carbohydrates

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

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

group of similar organisms that can breed and produce fertile offspring

conversion of nitrates into nitrogen gas

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

organism that obtains energy by eating both plants and animals

What is an organism that feeds only on plants called?

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

collection of all the organisms that live in the same place with their nonliving environment

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

scientific study of interactions among organisms and between organisms and their environment

Who's excited for the next part?

loss of water from a plant through its leaves

organism that obtains energy by eating animals

process where elements, chemicals, and matter are passed from one organism/biosphere to another

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

assemblage of different populations that live together in a defined area

Green plants are

part of Earth in which life exists including land, water, and air or atmosphere

Which of the following is NOT a basic method used by ecologists to study the living world?

diagram that shows the relative amounts of energy or matter within each trophic level

network of complex interactions formed by feeding relationships among organisms in an ecosystem

group of ecosystems that have the same climate and dominant communities

total amount of living tissue within a given trophic level

organism that can capture energy from sunlight or chemicals and use it to produce its own food

single nutrient that either is scarce or slow, limiting the growth of organisms in an ecosystem

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

process that plants use light energy to convert water and carbon dioxide into oxygen and sugar

series of steps in an ecosystem in which organisms transfer energy by eating and being eaten

An organism that cannot make its own food is called a(an)