The main function of chlorophyll is
to absorb carbon dioxide from the atmosphere
to absorb water and minerals from the soil
to give greenish colour to the leaves
to perform photosynthesis in the presence of sunlight
The function of veins present in leaves are
absorb water and minerals from the soil
absorb carbon dioxide from the atmosphere
transport water, food and minerals in a leaf
release oxygen and carbon dioxide into the atmosphere
Which one of the following time a plant may be preparing food?
1 a.m
10 a.m
10 p.m
midnight
Which one of the following is not needed for photosynthesis?
Iodine solution
Carbon dioxide
Chlorophyll
Water
Which one of the following performs photosynthesis in cactus?
Spines
Stem
Roots
Leaves
Which part of a seed provides energy for germination?
Stored food
Soil
Sunlight
During photosynthesis, plants use _____ gas and release ______ gas.
Carbon dioxide , Oxygen
Oxygen, Carbon dioxide
Oxygen, Nitrogen
NItrogen, Oxygen
Hanief covered a leaf with black cover for a few days and then tested it with iodine solution for the presence of starch in it. The colour of the solution did not turn blue black. What does this indicate?
Black cover absorbed all the starch present in the leaf
Iodine solution does not work with black covers
Starch is evaporated from the leaves
Starch is not prepared in the absence of light
When you are eating sugarcane, you are actually eating the
fruit of the sugarcane
root of the sugarcane
stem of the sugarcane
grains of the sugarcane
The main purpose of lowers is to
support
water
seeds
food
