Scientists study how the plants ______ sunlight into energy.

Why do some scientists study how plants convert sunlight carbon dioxide, and water into sugars and starches？ _______A Because they want algae to produce sugars and starches.B Because they want green plants to become a new source of energy.C Because they want to turn plant sugars to a new form of energy.D Because they want to make photosynthesis more efficient.

32 Scientists study how photosynthesis works because they want to_____.

A improve the efficiency of it.

B turn plant sugars to a new form. of energy.

C get more sugars and starches from plants.

D make green plants a new source of energy.

How is food for plants made？ Food for plants is made______

A.from water

B.from the air in the sky

C.from the soil

D.from water, things in the soil and air, sunlight

How is food for plants made？ Food for plants is made______

A.from water

B.from the air in the sky

C.from the soil

D.from water, things in the soil and air, sunlight

How is food for plants made？ Food for plants is made ______.

A．from water

B．from the air in the sky

C．from the soil

D．from water, things in the soil and air and sunlight

______more sunlight, these vegetable plants grow much better this year.

A．To receive

B．Having received

C．Receiving

D．Since receiving

Without heat and sunlight, plants on the earth ______ well.

A．would not grow

B．will not grow

C．had not grown

D．would not be grown