(a) Define catalyst.
(b) What are (i) positive catalysts and
(ii) negative cata lysts ? Support your answer wit h one example for each of them.
(c) Name three biochemical catalyst found in the human body.
Name the three kinds of muscles found in the human body. In each case, name one region in the body where they are found.
Name any three vestigial organs found in humans.
What are vestigial organs? Name two vestigial organs found in human body.