What is the special name of the contraction and expansion movement which pushes the food further in our digestive tract (or alimentary canal)?

What are outside raw materials used for by an organism?

State the various steps involved in the process of photosynthesis.

What are the functions of the liver and pancreas in the human digestive system?

Which cell structure is involved in the process of formation of glucose during photosynthesis?

In each of the following situations,what happens to the rate of photosynthesis?
$(a)$ Cloudy days
$(b)$ No rainfall in the area
$(c)$ Good manuring in the area
$(d)$ Stomata get blocked due to dust