Type of chocolate bar, size of it, surface it is placed on, etc
Controlled variables are anything that stay the same for both trials
Answer:
<em>When a baby is born, the zygote has become about </em><em><u>26 </u></em><em>billion cells</em>
Explanation:
Cell: Cell is defined as the structural and functional unit of living thing. I.e The cell is the simplest and the basic unit of life. All living things are made of cell.
Zygote: A zygote is a single cell formed from the union of a male cell called sperm and a female cell called egg.
<em>When a baby is born, the zygote has become about </em><em><u>26 </u></em><em>billion cells</em>
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Answer:
A. hairs on the back stand up when scared
Explanation:
B and C are not responses to stimuli, and D is a response to internal stimuli