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vichka [17]
3 years ago
6

There are many different types of scientific investigations. Which of the following forms requires the identification and contro

l of variables?
A.
model-building
B.
observational field studies
C.
collection of specimens
D.
laboratory experiments
Biology
1 answer:
ludmilkaskok [199]3 years ago
4 0

D) laboratory experiments because every experiment needs a control and a variable.

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