Answer:
a.The amount of noise
Explanation:
The dependant variable is the variable that changes when the science teacher leaves.
Independant variable would most likely be whether or not the science teacher is in the room.
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Biology is a branch of science that deals with living organisms and their vital processes. Biology encompasses diverse fields, including botany, conservation, ecology, evolution, genetics, marine biology, medicine, microbiology, molecular biology, physiology, and zoology.
There are three main recognized branches of biology, which include botany, zoology, and microbiology.
Answer:
A group of plants and animals that are all the same and that can breed together
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