garde 4 , lesson 4

Both of human and fish

• can breathe in air.

• use oxygen gas to breathe in.

• to breathe in water.

Fish use...........to breathe in water

• tail

• eyes

• Gills

Gills differ from lungs,

• take in oxygen gas.

• extract oxygen gas from water.

Gills in fish are considered as

• Behavioural adaptation

• SStructural adaptation

All of the following human activities can negatively affect the nature, except.

• cutting down forests.

• removing air pollutants.

• farming and clearing lands.

• throwing wastes in waterways.

Human activities and bad habits can pollute............of an ecosystem.

• air and soil only

• soil and waterways only

• air and waterways only

• air, soil and waterways

Pollution of an ecosystem can affect

• plants and animals only.

• animals and humans only.

• humans and plants only.

• plants, animals and humans.

If the environment is slowly changed, plants............ to survive and grow.

• must have a taproot

• must have buttress roots

• must decrease their adaptation

• must land their seeds in another better place

From the negative effects of human activities on the human health are

• asthma and wounds.

• lung damage and wounds.

Human can help restoring ecosystem by all of the following activities, except

• replanting the cleared forests.

• removing air and water pollutants.

• producing more factories exhausts.

• preserving existed plants and animals.