Hey There!
Here is your answer:
Your answer is that a experiments should be controlled because the experiment could go out of control which could harm or hurt someone.
Also the definition of a controlled experiment is a part of the experiment that's not touched.
Ex: Water is your controlled experiment that's because our not doing anything to the water.
If you need anymore help just ask me!
Hope this helps!
The answer you are looking for is:
D.) Eukaryote
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Have a wonderful day!!
I am assuming you would recommend a specialist.
The DNA is condensed before replication in the form of chromosomes and then the chromosomes are divided.
Answer:
circulatory system is the answer
