There are three kinds of things in the world ?

______ do not have a life cycle.

_____ is the sum total of all chemical and energy changes taking place in a living organism.

_______ is the sum total of life process resulting in the building up of the living substance.

The maintenance of a constant internal environment is called ________.

_______ are of different size  and shape.

An example of a unicellular organism ?

An example of a homeothermic animal.

A ____ can grow in size.

Catabolism means _______.