If we look in a microscope how do we know something is a cell
1 answer:
It will have a nucleus , cell wall , cytoplasm , cell membrane depending on what cell it is
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B) All living things are made of cells.
Answer:
B cell membranes protect a cell,and cell walls do not
Independent variable: is the UV light exposure
Control group: people not exposed (sample b)
Dependent variable: skin cancer
Experimental group: (sample A)