Name one substance which is produced in anaerobic respiration by an organism but not in aerobic respiration.

X is a wild animal which eats only the flesh of other animals whereas Y is a domestic animal which feeds mainly on green grass.

(a) What are animals like X known as?

(b) What are animals like Y known as ?

(c) Which animal, X or Y, has a longer small intestine? Why?

(d) Name one animal which is like X.

(e) Name one animal which is like Y.

Do all cells use oxygen to produce energy?

Name one organism which can live without oxygen.

In which type of respiration, aerobic or anaerobic, more energy is released?