Answer:
meteorite
Explanation:
When it is in space it is called a meteorite, when coming into the atmosphere it is a meteor, and when it hits earth it is a meteoroid.
Usually the plant cell has a vacuole in fact animals or humans do have a vacuole but very small although the plant type cell has the largest.
B. the contraction and relaxation of the brain
The trachea is a single tube through with oxygen passes to the double-tubed bronchi as we breathe air inside. The two tubes of bronchi are called left and right bronchi and are often termed as alveoli and bronchioles
I believe the answer is B!
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Hope this helps
Lipids in blubber insulate the animals from cold water.