Class7 dav ch 1 question E answer
Answers
Explanation:
1.life would not be possible on the earth in the absence of photosynthesis because photosynthesis is a unique process it is the process that surprise food directly or indirectly for all living organism the energy of these gets passed on to all organisms grow plants plants also provide oxygen needed by all organisms for respiration .
2(a). mushroom is a saprotroph because it grows on dead and decaying matter like rotten wood .
(b). sun is a ultimate source of energy for all living organism because all living organism plant or animals directly or indirectly depends on solar energy for their food .
(c). stomata are the tiny pores present on the surface of leaves through which oxygen enters the leaf in the process of photosynthesis it is stomata are blocked there plants cannot prepare their food by the process of photosynthesis as a result the leaf of a plant dies out .
(d). leaf is known as the food factory of the plant because plants prepare their food in leaf the leaves are green due to the presence of pigment chlorophyll it has the least to capture solar energy solar energy is used to prepare food .
(e). leachen is a living partnership between a fungus and alga and the partnership is beneficial to both because the fungus absorb water and provide selther. the alga prepare food by photosynthesis .