PLEASE HELP ILL GIVE BRANLIEST TO THE RIGHT ANSWER Which of the following is a characteristic of a scientific experiment?

1) Its results always support the hypothesis.

2) it shows cause and effect relationships.

3) it is preformed in nature.

4) it can be performed only once.

Oxygen passes through capillary walls and into interstitial space where cells absorb ? a. nitrogen, b. oxygen, c. carbon dioxide, d. metabolic waste

The average adolescent should consume no more than of fat per day.

Take a nutritional supplement during times of stress a. is recommended by al doctors as a stress management technique b. has been scientifically proven to aid in stress management c. only adds to the stress you’re feeling d. can you feel better because you believe it will you