Assertion :- Cervix contains the largest and the most powerful sphincter muscle in the body
Reason:- Ovum needs energy to go about in search of a spermatozoa for fertilizaion .

Assertion: Cervix contains the largest and the most powerful sphincter muscle in the body. Reason: Cervix opens into the vagina by external OS.

Assertion: Most of the contents of the primary oocyte are retained by the ovum and is much larger than spermatozoon. Reason: Ovum needs energy to go about in search of spermatozoa.

Assertion : Time taken by a body to complete a given work has nothing to do with energy of the body. Reason : Because power of a body is the rate of doing work.

Assertion : Mitochondria are known as "power house" of the cell Reason : Mitochondria are used to bring about energy requiring activities of the cell.

Assertion Power of locomotion is poor in Ascaris. Reason The body wall of Ascaris has cuticle, but lacks circular muscles.

Assertion : Carbohydrate are most suitable for the production of energy in the body than proteins and fats. Reason : Carbohydrates can be stored in tissues as glycogen and be stored in tissues as glycogen and can be used for protissues and fats.