Green plants

Plants help people breathe by releasing which gas?

Rice and grass are examples of -

• Herbs

• Shrubs

• Trees

• Climbers

Anish covered a leaf of a potted plant and kept the plant under sunlight for a few days and then tested it with iodine solution for the presence of starch in it. The colour of the covered leaf did not turn blue-black. What does this indicate?

• Iodine solution does not work with black covers.

• Starch is evaporated from the leaves.

• Starch is prepared only in the presence of sun light

• The black cover absorbed all the starch present in the leaf.

Function of the stem is .......

• to be green

• to support the plant

• to absorb nutrients from the soil

A leaf is green in colour due to the presence of a green pigment called________________.

• lamina

• chlorophyll

• stalk

• petiole

Plants prepare their own food by the process known as ___________________.

• transpiration

• evaporation

• photosynthesis

Which part of a plant performs most of its photosynthesis?

• roots

• stem

• leaf

What do plants need to make their own food?

• oxygen, carbon dioxide, sugar

• sugar, water, carbon dioxide

• sunlight, carbon dioxide, water

• carbon dioxide, water, sugar

At night, plants ......

• produce oxygen.

• release carbon dioxide.

The main source of energy on the earth is ___________.

• generator

• sun

• moon

• none of these