Which gland secretes the Ptyalin enzyme?

Answer the following:

A rabbit has a longer small intestine than a tiger. Give scientific reason.

Draw the diagram of open and closed stomata and label:

a) chloroplast
b) guard cells

Hari had a problem with carbohydrate, protein and fat metabolism in his body:

a) Name the element he must include in his diet to overcome this problem.

b) Give one symptom of the deficiency disease caused in the above.

Study the following diagram of human tongue and identify the part I, II, and III

Name the following:

The first enzyme to mix with food in the digestive tract

Answer the following:

Write a point of difference between parasites and saprophytes.

What is photosynthesis? Write any three factors that affect photosynthesis.