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daser333 [38]
3 years ago
14

An experiment in which only one variable is changed is a(an) __________ experiment.

Biology
2 answers:
ahrayia [7]3 years ago
7 0
D. <span>controlled 
is the right answer because a</span><span>n </span>experiment<span> in which an observer tests a hypothesis by looking for changes carried by alterations to a variable.</span>
Anni [7]3 years ago
5 0

Hi


The correct answer is : D

Because a control experiment is one in which a hypothesis is tested by the manipulation of a single variable.


I hope that's help:)

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