Life On Earth-Energy In Ecosystems

Question 1

Competition

Answer 1

The interaction between organisms for the same limited resources.

Question 2

Carnivore

Answer 2

An organism which only eats other animals.

Question 3

Consumer

Answer 3

An organism that needs to eat other organisms for energy.

Question 4

Primary consumer

Answer 4

First consumer and eats the producer.

Question 5

Secondary consumer

Answer 5

Eats the first consumer.

Question 6

Decomposer

Answer 6

Organisms such as bacteria and fungi that breakdown dead organic material.

Question 7

Denitrifying bacteria

Answer 7

Breaks down nitrates to release nitrogen gas into the air.

Question 8

Herbivore

Answer 8

An organism which only eats plants.

Question 9

Interspecific competition

Answer 9

Members of different species compete for the same resources.

Question 10

Intraspecific competition

Answer 10

Members of the same species compete for the same resources.

Question 11

Nitrifying bacteria

Answer 11

Converts ammonium into nitrites and then nitrites into nitrates.

Question 12

Nitrogen fixing bacteria

Answer 12

Converts nitrogen gas into nitrates.

Question 13

Omnivore

Answer 13

An organism which eats plants and animals.

Question 14

Producer

Answer 14

A green plant able to produce food by photosynthesis.

Question 15

Pyramid of biomass

Answer 15

The total mass of organisms a each level of a food chain.

Question 16

Pyramid of energy

Answer 16

The quantity of energy at each level of a food chain.

Question 17

Pyramid of numbers.

Answer 17

The number of organisms at each level of a food chain.