Many research studies have shown that different species may possess some of the exact same genes but show vastly different traits. How can that happen?
Mutation can occur or the order in which these genes appear are in different order. Genetic variation can also occur.
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When the ball is rising up, it gains kinetic energy. when the ball reaches the very top, it will have all potential energy, until it falls back down and gains it kinetic energy. finally when you catch the ball or it falls back down, it would have gained its potential energy back.
The nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons