Ecosystem Energy Transfer

What is the ultimate source of energy for almost all organisms?

• producers

• consumers

• the sun

• bacteria

Which of these consumers might depend on a rabbit for its energy?

• grasshopper

• coyote

• cow

• horse

A consumer that eats only producers is called a(n)

• omnivore

• carnivore

• autotroph

• herbivore

What term is used to describe a linear sequence in which energy is transmitted from one organism to the next as each organism eats another organism?

• food web

• food chain

• trophic level

• energy pyramid

An atmospheric gas that increases when fossil fuels are burned

• algal bloom

• carbon dioxide

• phosphorous

• nitrogen-fixing bacteria

The process in which energy from the sun is used by plants to make sugar molecules

• cellular respiration

• photosynthesis

• nitrogen cycle

• carbon cycle

illustrates the loss of energy from one trophic level to the next

• energy pyramid

• food web

• producers

• food chain

A diagram that shows the many feeding relationships that are in an ecosystem

• food chain

• ecosystem diagram

• food web

• food pyramid

How do lichens contribute to primary succession?

• lichens begin to break down rock to form soil

• lichens decompose organic matter from animals and plants

• lichens are nitrogen-fixing bacteria

• lichens convert carbohydrates into fossil fuels

The energy consumed by organisms

• undergoes magnification in food chains

• is not partially lost during digestion

• remains constant at all trophic levels

• can be stored in fat and sugar molecules