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densk [106]
3 years ago
11

Why do experiments usually require a control?

Biology
1 answer:
zalisa [80]3 years ago
4 0
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!
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A predator can be define as an organism superior and strong enough to kill inferior and weaker organism. This organism kill other organism to obtain it as food. A prey is an organism which is weak and cannot defend itself from the attack of the superior organism.

d. is the correct option. This is because the predators do not bother about the age and strength of the prey. They attack over them whether the prey is weak , young, prime, or old and try to obtain it as food.

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