ecology 2

Question 1

food chain

Answer 1

Shows the flow of energy from one organism to another.

Question 2

food web

Answer 2

A network of interconnected food chains.

Question 3

pyramid of number

Answer 3

Shows the number of organisms at each trophic level.

Question 4

• Pyramid of biomass

Answer 4

shows the total mass of organisms at each level.

Question 5

pyramid of energy transfer

Answer 5

Shows the energy transferred at each trophic level

Question 6

what is a niche

Answer 6

A niche is the role of an organism in its ecosystem (e.g. its food source, habitat, activity time).

Question 7

Why do different organisms have different niches?

Answer 7

Different organisms have different niches to reduce competition.

Question 8

Why do toxic materials have greater effect on top predators in a food chain

Answer 8

Top predators eat many organisms, so toxins increase up the food chain and can harm or kill predators.

Question 9

Bioaccumulation

Answer 9

When toxins like pesticides build up in organisms

Question 10

How do biotic factors affect population size and distribution of organisms?

Answer 10

Predators, diseases, food availability and competition