Life on earth

Question 1

Definition of carnivore

Answer 1

Consumer which eats other animals

Question 2

Defnititon of herbivore

Answer 2

Consumer which eats plants

Question 3

Omnivore

Answer 3

Plants and animals

Question 4

Producer

Answer 4

Make their own food via photosynthesis

Question 5

Consumer

Answer 5

Eats other organisms

Question 6

Population

Answer 6

Number of same species in a habitat

Question 7

Biodiversity

Answer 7

Variety of different species which exist in a habitat.

Question 8

Prey

Answer 8

Eaten by predators

Question 9

Biotic factors

Answer 9

Competition for resources, disease, food availability, grazing and predation.

Question 10

Abiotic factors

Answer 10

Light intensity , moisture , ph and temperature

Question 11

Describe stage 1 photosynthesis

Answer 11

Light reactions ,
The light energy trapped by chlorophyll in chloroplasts and converted into chemical energy to generate ATP

Question 12

Water is split to produce?

Answer 12

Hydrogen and oxygen

Question 13

Word summary for photosynthesis

Answer 13

Co2+ H20 —> sugar + oxygen

Question 14

Describe carbon fixation

Answer 14

A series of enyzme controlled reactions which use hydrogen and ATP with carbon dioxide to produce sugar.

Question 15

What’s essential for light reactions?

Answer 15

Light 😜

Question 16

What’s absorbs the light

Answer 16

Chlorophyll

Question 17

3 limiting factors of photosynthesis

Answer 17

Light intensity , temperature, carbon dioxide

Question 18

True or false
Pyramids of numbers show the NUMBER of organisms at each level of food chain

Answer 18

True

Question 19

Pyramids of energy show

Answer 19

The energy produced by organsims

Question 20

Increasing human population requires

Answer 20

Increase crop yeild

Question 21

Fertilisers provide chemicals such as

Answer 21

Nitrates which increase crop yeild

Question 22

True or false
Nitrates dissolve in soil

Answer 22

True

Question 23

Describe events of algal bloom

Answer 23

1. Fertilisers leach onto water.
2. Reduces light levels, killing plants.
3. These dead plants become food for bacteria.
4. Bacteria increases which uses us oxygen , reducing oxygen for other organisms.

Question 24

Give an example of natural fertiliser

Answer 24

Introducing a predator

Question 25

What is bioaccumulation

Answer 25

The build up of toxic substances in living organisms

Question 26

What is a mutation

Answer 26

Random change to genetic material.

Question 27

What can increase rate of mutation

Answer 27

Radiation , chemicals.

Question 28

Define speciation

Answer 28

The development of new species