Ecology Review

The algae at the beginning of the food chain are

• consumers

• decomposers

• producers

An organism that uses energy to produce its own food supply from inorganic compounds is called a(n)

• heterotroph

• consumer

• autotroph

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

• chemosynthetic bacteria

• algae

• trees

• photosynthetic bacteria

The total amount of living tissue within a given trophic level is called the

• organic mass

• biomass

• trophic mass

What animals eat both producers and consumers?

• herbivores

• omnivores

• autotrophs

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

• third-level consumer

• first-level consumer

• producer

Only 10% of energy stored in an organism can be passed on to the next trophic level. Of the remaining energy, some is used for the organism's life processes, and the rest is

• stored as body tissue

• stored as fat

• eliminated as heat

The movements of energy and nutrients through living systems are different because

• energy flows in one direction and nutrients recycle

• energy is limited in the biosphere and nutrients are always available

• nutrients flow in one direction and energy recycles

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

• modeling

• recyclling

• ecology

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

• community

• biosphere

• biome