Q: Answer the question

Extinction of a species is most likely to occur as a result of
OPTIONS:
- evolution
- migration
- selective breeding
- environmental changes

A: environmental changes

Q: Answer the question

The nervous system is composed of cells, tissues, and organs. Which is a cell of the nervous system?
OPTIONS:
- brain
- spinal cord
- ganglion
- neuron

A: neuron

Q: Answer the question

A star is a large astronomical body that
OPTIONS:
- reflects light.
- condenses light.
- emits light.
- absorbs light.

A:
emits light.