Ecosystem

What is a consequence of removing biotic factors from an ecosystem?

• It increases the number of abiotic factors.
• It improves the health of the ecosystem.
• It can lead to the extinction of other species.
• It has no effect on other organisms.

What are biotic factors in an ecosystem?

• Only the animals that interact with plants.
• Non-living elements like water and soil.
• Only the plants and animals present.
• Living organisms such as man, animals, plants, bacteria, and fungi.

Which of the following best describes an ecosystem?

• A collection of abiotic factors only.
• A random assortment of plants and animals.
• A group of organisms living all alone.

• An ecosystem consists of all the organisms living together in an area and their interaction with one another as well as their environment.

How can human activities impact an ecosystem?

• By increasing biodiversity.
• By creating more natural resources.
• Through air, land, and water pollution.
• By enhancing natural habitats.

What is a primary reason animals compete with one another in an ecosystem?

• For food.
• For work.

• For recreation.

• For hiding.

What role do bacteria and fungi play in an ecosystem?

• They only compete with plants for resources.
• They only harm other organisms.
• Some bacteria and fungi cause diseases. When these bacteria and fungi multiply rapidly.

• They are not involved in any ecological processes.

Why do plants compete for sunlight?

• To grow taller than other plants.
• To attract more animals.
• To reduce the amount of water they need.
• To perform photosynthesis and produce food.

How does temperature affect organisms in a habitat?

• It makes organisms move faster.

• It only affects plant growth.
• It has no effect on their survival.
• It determines the types of organisms that can survive there.

Which of the following statements is true regarding abiotic and biotic factors?

• Abiotic factors are more important than biotic factors.
• Both abiotic and biotic factors affect the survival of organisms.
• Only abiotic factors affect organisms.
• Biotic factors do not influence abiotic factors.

Lizards increase their body temperature by