2. The tendency of offspring to differ from parents is called inheritance
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Answer:
As you age, your brain and nervous system go through natural changes. Your brain and spinal cord lose nerve cells and weight (atrophy). Nerve cells may begin to pass messages more slowly than in the past. Waste products can collect in the brain tissue as nerve cells break down.
Explanation:
No control variable
no hypothesis
only performed once
Answer:
it breaths and pumps its heart cuz this is a sign that the following person is alive
