GCSE Biology- Community Level Systems - 1 - Exam Style Questions with Answers

Created on December 31, 2022 By

paruppts12

GCSE_OCR_GEN_BIO_4_COMM_1

1 / 10

2000%

5%

0.05%

20%

2 / 10

Lack of oxygen ; aerobic decay is higher than anaerobic decay

Lack of oxygen ; anaerobic decay is slower than aerobic decay

sufficiency of oxygen ; anaerobic decay is lower than aerobic decay

3 / 10

What are the types of interdependence?

Parasitism

mutualism

predation

All of the above

4 / 10

Give 3 molecules which are cycled through ecosystems

nitrogen; oxygen; water

oxygen; carbon dioxide; water

nitrogen; carbon dioxide; oxygen

water; carbon dioxide; nitrogen

5 / 10

Give 4 things animals compete for

shelter; space; food; water

mates; space; food; oxygen

mates; space; food; water

6 / 10

Secondary consumers

Producers

Primary consumers

Tertiary consumers

7 / 10

How do you calculate the efficiency of biomass transfer?

efficiency= (energy transferred/ total energy available)×100

efficiency= (energy absorbed/ total energy available)×100

efficiency= (total energy available /energy transferred)×100

8 / 10

Give 4 abiotic factors that affect communities.

Light intensity; pressure; sand PH ; nutrient levels

Light intensity; temperature; soil PH ; moisture levels

Light intensity; pressure; soil PH ; water levels

Light intensity; temperature; sand PH ; oxygen levels

9 / 10

A

C

B

D

10 / 10

Why is recycling in ecosystems necessary?

.To create a continuous flow of minerals; to provide oxygen

To create a continuous flow of proteins; to provide water

To create a continuous flow of minerals; to provide pure oxygen

To create a continuous flow of nutrients; to provide fresh water

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