Give reasons for the following: (i) Life cannot exist on earth in the absence of photosynthesis. (ii) Parasites are harmful for the host plant. (iii) Saprophytes are cleaners of our environment.
Answers
Answer:
c) Insectivorous plants are partial heterotrophs. d) Total parasites are autotrophic. ... It is true because they can perform photosynthesis as they have chlorophyll in them and they can also act partially as heterotrophs by taking the required nutrients from the insects which they eat.
Answer:
[i] In the absence of green plants, there would not be the process of photosynthesis.Besides oxygen which is essential for the survival of all living organisms is produced during photosynthesis. Thus, we can say that life would be impossible on the earth in the absence of photosynthesis..
[ii] A parasitic plant has many obstacles to overcome to attach to a host. Distance from the host and stored nutrients are some of the problems, and the host's defenses are an obstacle to overcome. The first hurdle is penetrating the host..
[iii] Saprophytes are the microorganisms and plants which feed on dead and decaying organic matter. Thus they consume the entire waste materials. They add to the fertility of soil by their activity. Examples are bacteria, fungi, protozoans and some algae.
So they clean the atmosphere by consuming the dead decaying animal and plant debris. Along with this they add to the fertility of soil.
Explanation: