Year 7 Biology Revision Part 2

What does the arrow in a food chain represent?

• Direction of running
• Flow of sunlight
• Flow of energy
• Movement of water

Answer explanation

The arrow shows the direction of energy transfer between organisms.

What is a producer in a food chain?

• An animal that eats others
• A decomposer
• A plant that makes its own food
• A top predator

Answer explanation

Producers are usually green plants that make food using sunlight.

Which of the following is a consumer?

• Grass
• Mushroom
• Cow
• Sunlight

Answer explanation

Consumers eat other organisms for energy, like cows eating grass.

Which organism breaks down dead plants and animals?

• Herbivore
• Producer
• Decomposer
• Carnivore

Answer explanation

Decomposers recycle nutrients by breaking down dead matter.

Which is a role of microorganisms in a food web?

• Eating plants
• Making oxygen
• Decomposing dead material
• Acting as predators

Answer explanation

Many microorganisms act as decomposers in ecosystems.

What is a herbivore?

• Eats meat only
• Eats plants only
• Eats both meat and plants
• Decomposes waste

Answer explanation

Herbivores only eat plants.

What is an omnivore?

• Eats meat
• Eats plants
• Eats both plants and animals
• Eats only decomposed material

Answer explanation

Omnivores eat both plant and animal matter.

What is a tertiary consumer?

• The first organism in a food chain
• A plant
• The third-level consumer
• A microorganism

Answer explanation

Tertiary consumers eat secondary consumers.

Which is the apex predator in a food web?

• The top predator with no predators
• A plant
• A decomposer
• The smallest animal

Answer explanation

The apex predator is at the top and is not hunted by other animals.

What might happen if one species is removed from a food web?

• Nothing will change
• Only producers will be affected
• The entire food web could be affected
• Decomposers will stop working

Answer explanation

Every organism in a food web depends on others for survival.