Revision Ch 1 to 4

Organisms which prepare food for themselves using simple naturally available raw materials are referred to as

• heterotrophs

• Saprotrophs

• parasites

• Autotrophs

Some plants depend on insects for some specific nutrients because

• They didn't make their own food

• They grow in a specific nutrient deficient soil.

• They don't have cholorophyll

• They don't have leaves

An iron ball heated to 80°C is paced in a vessel of hot water heated to 70°C. the heat Will

• No flow of heat will take place

• Flow from water to ball

• Flow from ball to the water

• None of the above

This is a synthetic indicator

• Turmeric

• Phenolphthaline

• China rose

• Litmus

What do we call the digestion process in grass eating animals?

• Legumination

• Irrigation

• Rumination

• determination

Leguminous plants help in the

• absorption of water

• carbon dioxide fixation

• Oxygen fixation

• Nitrogen fixation

The gentle wind coming from the sea to land is called

• Wind breez

• Sea breeze

• Land breeze

• None of the above

How plants get raw materials from the surroundings ?

• From soil

• From air

• From both soil and air

• None of the above

Which of the following acid causes acidity in our stomach?

• Hydrochloric acid

• Citric acid

• Acetic acid

• Sulphuric acid

Conduction is the method of transfer of heat in?

• Liquid

• Solid

• Air

• None of the above