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Human influence on ecosystem

Authored by resmi ragenth

Biology

10th - 11th Grade

Used 276+ times

Human influence on ecosystem
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10 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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The table shows some information about two closely related species of sea bird.

Sewage pollution at the mouth of a river destroys its fish stocks. What is likely to happen to local populations of these birds?

A There will be no change to either species.

B Species X numbers will decrease, species Y will remain constant.

C Species Y numbers will decrease, species X will remain constant.

D Both species numbers will increase

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A large amount of herbicide is applied to a field. Heavy rainfall carries much of it into a nearby lake.

What will be the effect of this on the lake?

A Herbicide decreases the growth of water plants.

B Herbicide decreases the number of bacteria.

C Herbicide increases the rate of evaporation from the lake.

D Herbicide kills the fish.

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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The diagram shows four positions on a river where water samples were taken.

Which graph shows oxygen concentrations in the river?

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4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which process may result in eutrophication in a lake?

A bleach entering from a factory

B fertilisers entering from farmland

C hot water entering from a power station

D pesticides entering from farmland

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Over-use of fertilisers on farmland causes the chemicals in the fertilisers to be washed into ponds and lakes.

This causes eutrophication resulting in the following events.

1 algae grow

2 fish die

3 bacteria grow

4 oxygen decreases

What is the correct sequence of these events?

A 1 → 3 → 4 → 2

B 1 → 4 → 3 → 2

C 3 → 4 → 2 → 1

D 4 → 1 → 2 → 3

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

The graph shows changes in part of a lake after it has been polluted by fertilisers from a nearby farm.

At which time will the oxygen concentration in the water be lowest?

A

B

C

D

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which feature of deforestation has the greatest effect on the atmosphere?

A extinction of forest animal species

B increased risk of flooding

C reduction of photosynthesis

D soil erosion

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