Why would life not be possible on the earth in the absence of photosynthesis?
2
Give reasons for the following:
(a) Mushroom is a saprotroph.
(b) Sun is the ultimate source of energy for all living organisms.
The leaf of a plant dies out' if its stomata are blocked.
(d) Leaf is known as the food factory of the plant.
Answers
Answer:
the leaf of a plant dies out if its stomata are blocked
Answer:
1.....Plants are the basic source of food for all the organisms. They prepare food by the process of photosynthesis. So, if there is no photosynthesis there will no food and life would be impossible without it.
#give reason
a....Mushroom is saprotroph because it has no chlorophyll to make its own food.So it grows on dead and decaying matters and take their food from them. Mushroom is a saprotroph because it does not has chlorophyll content in its leaves.
b...because it is the source of almost all energies of the earth. Plants convert light energy from the sun into chemical energy (food) by the process of photosynthesis. Animals eat plants and use that same chemical energy for all their activities.
So, the correct answer is 'Sun'.
c.....The stomata are the pores surrounded by guard cells which help plant to take in carbon dioxide and take out oxyzen. This is so because when the stomata was blocked the plant was unable to take in carbon dioxide and hence unable to perform photosynthesis .
d....Leaves are small solar-powered food factories. Through a process called photosynthesis they make their own food. Using only water, carbon dioxide and the Sun's energy, they produce glucose and oxygen. They form the basis of the global food chain.