Put the sentences into the interrogative and negative forms1. Animals and plants live under different conditions2. Life exist in many places in the world3. Biologists have made a great contribution to scince4. A knowledge of biology will help you to keep healthy5. Biologists control many diseases6. Some animals can exist under the immense pressure of the deep seas7. Scientific methods of farming have given us much more food

Interrogative: Do animals and plants live under different conditions?
Negative: Animals and plants do not live under different conditions.

Interrogative: Does life exist in many places in the world?
Negative: Life does not exist in many places in the world.

Interrogative: Have biologists made a great contribution to science?
Negative: Biologists have not made a great contribution to science.

Interrogative: Will a knowledge of biology help you to keep healthy?
Negative: A knowledge of biology will not help you to keep healthy.

Interrogative: Do biologists control many diseases?
Negative: Biologists do not control many diseases.

Interrogative: Can some animals exist under the immense pressure of the deep seas?
Negative: Some animals cannot exist under the immense pressure of the deep seas.

Interrogative: Have scientific methods of farming given us much more food?
Negative: Scientific methods of farming have not given us much more food.