The outer core. A molten nickle- iron alloy.
Answer:
Bacteria
Explanation:
Bacteria is a prokaryote because it has no true membrane-bound nucleus.
Sebum waterproofs and lubricates the hair and skin of mammals
An experiment is a procedure that tests a hypothesis by the process of collecting information under controlled conditions.
<h3>What is a controlled scientific test of hypothesis ?</h3>
A controlled experiment is a scientific test done under controlled conditions, meaning that just one (or a few) factors are changed at a time, while all others are kept constant.
- Controlled experiment. an experiment that compares the effect of one manipulated variable to a group that receives no treatment. controlled variables. factors that should be kept the same in both the treatment group and the non-treated group.
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