Which of the following is NOT a chemical of life?

The one factor that a scientist changes in an experiment is called the

A bird fluffs its feathers to trap body heat to keep warm during winter months. This is an example of

_____ reproduction involves only one parent.

The process of change during an organism’s life that results in a more complex organism is called _____.

Bacteria, the most numerous organisms on Earth, are

______organisms.

Another name for living things is organisms.

Organisms break down and build up materials in a process

called ______.

In sexual reproduction, offspring are _____ the parent.