A rice plant makes its own food using light. What is its role in a food web?

A goat feeds on grass and other plants. Which feeding group does it belong to?

A chicken eats grains and insects. How is its diet classified?

An animal feeds on frogs and rats rather than plants. Which feeding group fits its diet?

Fungi break down fallen leaves on a forest floor. What role are they performing?

A crow eats a fish that has already died. What role is the crow performing during this meal?

Where does most energy entering a rice-field food web originally come from?

In a food web, an arrow points from a frog to a snake. What does this arrow mean?

How does a food web differ from a food chain?

Use the diagram. Which organism is a second-order consumer on the path through the insect?

Use the diagram. What is the feeding level of the final organism?

Look at the energy pyramid. Which level has the most energy available?

Why can an animal pass on only part of the energy it gets from food?

Without organisms that break down dead material, what would happen to many nutrients?

People catch too many small fish in a coastal bay. What is a likely effect on larger fish that eat them?

Which human activity most directly removes many forest organisms' feeding and nesting sites at once?

A cow and a goat try to eat the same limited patch of grass. Which interaction occurs?

Two nearby trees draw from the same limited supply of water. How can this affect their growth?

Which ecological interaction is shown in the picture?

A small fish eats insect larvae and is eaten by a heron. Which roles does the fish have?

In a grassland, predators of plant-eating animals decline. If other conditions stay the same, what change is most likely?

What term describes a close, lasting association between organisms of different species?

A bee gets nectar from a flower and carries its pollen to another flower. Which relationship does this illustrate?

An orchid uses a tree's bark for support without helping or harming the tree. Which ecological relationship is illustrated?

A mosquito gains food by sucking a person's blood, causing irritation. Which relationship is illustrated?

Which pair has an interaction that helps both organisms?

What is a tick that feeds while attached to a dog's skin called?

An introduced fish spreads rapidly in a Laguna river and competes with native fish for limited food. What effect on native fish is most likely?

Which is a biotic factor in a school garden?

Which rainforest factor is abiotic?

Which pair contains only biotic factors in the Ifugao rice terraces?

For a coral reef, which change involves an abiotic factor?

Which abiotic river factor most directly affects how hard fish must swim to remain in the same place?

A caterpillar chews a seedling's leaves. Which type of environmental factor is affecting the seedling?

Algae grow more slowly in a shaded pond than in an unshaded pond. Which process is most directly limited by reduced light?

Which observation best supports the claim that soil type affects seedling growth?

During a long dry period, garden plants wilt. Which abiotic requirement is most likely lacking?

To study how light affects seedlings, which setup gives the clearest comparison?

Which example shows an organism interacting with a nonliving part of its environment?

Paolo uses matched seedlings and changes only one condition between groups. Which comparison investigates a biotic factor?