<span>The only way to test a particular variable for sure is to leave all other variables constant, and if a change in ONE variable creates an overall change, then you know that that variable caused it. But if you change 2 variables, and something changes, you don't know which one changed it for sure. </span>
The answer is C
Because the sun Shines only on the equator which is the law of conversion of energy
<em><u>[</u></em><em><u> </u></em><em><u>TILT </u></em><em><u>]</u></em>
Explanation:
The 23.5° <u>tilt</u> in the Earth's axis of rotation.
Answer: salty and sour
Explanation:
Taste buds consist of the taste receptor cells and they're the nerve endings on the tongue that provide the sense of taste.
Based on the information given, the tastes that activate these receptors are salty and sour. The tastes depolarize the cell receptor directly.
Answer: it is involuntary, the process is called digestion.
Explanation: