Answer: D
Explanation: the continents wee once connected. It was known as Pangea
N an experiment the "control" is the group of people or object this is used to measure the effect of the variable. The "control" is the thing that does not change and is not the thing in question.
In an experiment the "variable" is the thing which is changed and manipulated by the experimenter. It is the effect of something,
Example: You want to test a drug. you get a group of 40 people. 20 people are given the pill, 20 people are not given the pill but a sugar pill. the people who have the pill is the "variable" and the people who dont have the pill is the "control".
<span>In general, a species' realized niche will be smaller than its fundamental niche due to interactions with other organisms in the community.
Hope that helped you.
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Hey pizzalover! The answer from this question would be
a. oxygen
Hope it helps
