This is true, Darwin spent over 20 years developing his theory of natural selection
The correct answer to this question is:
“The prediction is useful because it explains what observations will be made if a hypothesis is true.”
The two types of cell transportation are as follows: active transportation, where energy is used, and passive transportation, where no energy is used
Answer:
<em><u>CERE</u></em><em><u>BROSPINAL </u></em><em><u>FLUID</u></em>
<em><u>(</u></em><em><u> </u></em><em><u>CSF)</u></em><em><u> </u></em>
Explanation:
- the clear watery liquid that surrounds the brain and spinal cord and fills the four cavities or ventricles of the brain is known as CEREBROSPINAL FLUID
hope it's helpful
