People who have darker skin have more melanin which is a black or dark brown pigment in the skin. When we are out in the sun our skin produces more melanin, which helps our skin be more resistant in the sun. This is why we tan.
Answer:
Hypotheses about the origins of life
That can be true. Everyone (mother) is different. That usually goes away after nursing for awhile.
Without a control group there wouldn’t be any basis for knowing if a result is due to the variable being tested
Answer:
Explanation:The investigation is aimed at understanding
1. how molecular size affects movement through a membrane.
Therefore
2.Add more of the proteins to the plasma membrane.
Then measure the rate of the particle movement
