Photosynthesis

Plants can make their own food by:

• respiration

• photosynthesis

• both

• none

Plants can photosynthesize due to the pigment:

• carotene

• xanthophyll

• chlorophyll

• none

The factors necessary for photosynthesis are:

• sunlight

• carbondioxide

• water

• All of the above

Increasing light intensity increases:

• rate of respiration

• rate of photosynthesis

• both

• none

If temperature increases above optimum range the rate of photosynthesis declines due to:

• transpiration

• enzyme degeneration

• respiration

• none

The reactants of photosynthesis are:

• carbon dioxide and oxygen

• carbon dioxide and water

• oxygen and water

• none

Plants give off _____________ gas during photosynthesis:

• carbon dioxide

• oxygen

• both

• none

Farmers can increase CO₂ quantity in green houses by lighting:

• candles

• paraffin lamps

• both

• none

If a plant gets very less water, its rate of photosynthesis will:

• decrease

• increase

• stay the same

• none

Some additional factors which affect the rate of photosynthesis are:

• amount of chlorophyll, amount of water

• pollution

• amount of chlorophyll, amount of water and pollution

• none