What is the starting point in the production of food and why?

What steps should be taken to improve production of food from animal sources in our country ?

If vec(PQ) is a ray. (a) What is its starting point? (b) Where does the point Q lie on the ray? (c) Can we say that Q is the starting point of this ray?

What is food?

What are starting points of grazing food chain and a detritus food chain respectively?

Why is the use of aspartame limited to cold foods and drinks?

What is detritus food chain?

What is food poisoning?

What are the various enzymatic types of glandular secretions in our gut helping digestion of food? What is the nature of end products obtained after complete digestion of food?