False. Their exoskeletons are made of silica.
Where are the choices? What following answers?
Answer:
600
Explanation: there is always a 3:1 ratio when you have a dominant and recessive trait.
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Answer:
negative feedback
Explanation:
Insulin reduces blood sugars when the levels are high in the blood. The hormone is produced by the pancreas and binds on receptors of cells. This initiates cell signaling mechanisms that signal the cell absorb sugars. When the blood sugars get back to normal, insulin production is reduced.
The first one is hyperbole.