Benchmark Quarter 3

Why do all animals need to eat other organisms, but plants do not?

• A. Plants can make all of their own nutrients and sugar, but animals must get them from other organisms.

• B. Plants cannot move, but animals can, so plants must get their nutrients from the soil.

• C. Plants make their own sugar, but animals must get it from other organisms.

• D. Plant cells are simpler than animal cells, so they need fewer nutrients and are able to absorb them from the soil.

A frog feeds on a grasshopper for food. How does the food provide energy to the frog?

• The food is broken down to release energy.

• The food is stored in the body to produce energy.

• The food combines with ATP to form energy molecules.

• The food releases carbon dioxide to produce energy molecules.

In which example would chemical energy transfer from one organism to another?

• a squirrel eating a nut

• a beaver building a dam

• a lizard warming itself in the sun

• a tree's roots breaking up a rock

Why do all living organisms either make or consume glucose?

• It is a source of energy for all cells.

• It is a source of vitamins and minerals.

• It helps prevent infections.

• It removes toxins from cells.

How do these animals help the Arctic fox survive?

• by supplying food to the fox

• by giving companionship to the fox

• by eliminating competitors

• by protecting from predators

Which situation shows an interaction between abiotic and biotic factors?

• a bear catching a fish

• a mouse breathing in air

• a volcano pouring out lava

• a bird living on a tree branch

Which food chain accurately shows the flow of energy in a field ecosystem?

• A) Sun → Crow → Cow → Decomposers

• B) Sun → Grasses → Cow → Decomposers

• C) Sun → Wheat → Woodchuck → Decomposers

• D) Sun → Oats → Mouse → Decomposers

Which statement best explains the reason for the decrease in available energy with each higher trophic level?

• Some energy is lost to the environment.

• Some energy is converted into nonliving matter.

• Some energy is consumed by the producers.

• Some energy is broken down by the decomposers.

A mouse eats grasshoppers that feed on plants. An incomplete energy pyramid diagram is shown. At which level do the grasshoppers belong in the energy pyramid?

• level P

• level Q

• level R

• level S

The diagram shows two processes that help in the cycling of matter in a food web. What are the two processes called?

• 1: respiration; 2: photosynthesis

• 1: decomposition; 2: respiration

• 1: photosynthesis; 2: decomposition

• 1: decomposition; 2: photosynthesis