<span>He meant the micro-organisms (microbes) are very small living organisms but plays an important role in maintaining life on earth. Microbes fix gases and break down animal matter and dead plants into simpler substances that are used at the beginning of the food chain. Pasteur shows that vaccines against infectious diseases can be manufactured. </span>
The only consumables that is not digested and is immediately absorbed, would be water, it is nothing but a polar compound that does not yield as much energy as all of the other molecules.
As such, it is a Carcinogen which is basically just a substance that is known to cause cancer.
Hope this helped :)
Answer:
D. rigidity and shape that's why in plants they stand upright for photosynthetic process.
