Unit 3-Ecosystems

Question 1

The variety of life forms in a particular area.

The higher it is the better

Answer 1

Biodiversity

Question 2

Organisms which produce their own food source

Answer 2

Producers

Question 3

Organisms which require to eat other organisms to survive

Answer 3

Consumer

Question 4

Organism which only eats plant material

Answer 4

Herbivore

Question 5

Organism which eats both plant and animal matter

Answer 5

Omnivore

Question 6

Organism which only eats animals

Answer 6

Carnivore

Question 7

Define the word: Species

Answer 7

Organisms that can reproduce to have fertile offspring

Question 8

The number of one species of organism in a habitat

Answer 8

Population

Question 9

All the different species in a habitat

Answer 9

Community

Question 10

Define the word: Ecosystem

Answer 10

All the living organisms and non-living components in a particular habitat

Question 11

Define the word: Niche

Answer 11

The role an organism plays within a community

Question 12

Intraspecific competition occurs between …

Answer 12

Members of the SAME species

Question 13

Interspecific competition occurs between …

Answer 13

Members of different species

Question 14

Give an example of something organisms would compete for

Answer 14

Sunlight (plants)

Habitat

Food

Mates

Question 15

Why is intraspecific competition more intense than interspecific?

Answer 15

Organisms of the same species all require the exact same resources

Question 16

Used to show the feeding relationships that exist in an ecosystem

Answer 16

Food chain

Question 17

Represented by arrow in food chain

Answer 17

Direction of energy flow and mean ‘gets eaten by’

Question 18

% of energy transferred at step of food chain

Answer 18

Around 10%

Question 19

% of energy lost at each step in food chain

Answer 19

Around 90%

Question 20

In a food chain, the majority of energy is lost as

Answer 20

Heat

movement

undigested materials

Question 21

Describe an ecosystem that would have this type of pyramid of numbers

Answer 21

Grass→ Grasshopper→Frog→Hawk

Question 22

Describe an ecosystem that would have this type of pyramid of numbers

Answer 22

Few producers with a very large biomass that support a larger number of smaller consumers.

Oak tree→ insects→woodpeckers

Question 23

Describe an ecosystem that would have this type of pyramid of numbers

Answer 23

An ecosystem where the community contains parasites.

Heather plants→ red deer→deer ticks