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zzz [600]
3 years ago
15

ASAP! What is the control variable?

Biology
2 answers:
umka2103 [35]3 years ago
5 0
The controlled variable is an element that is not changed throughout an experiment, because it’s unchanging state allows the relationship between the other variables being tested to be better understood.
diamong [38]3 years ago
5 0

Answer:

A control variable is the element that is constant. it does not change throughout the experiment as it helps researchers understand the effect of what's being tested by comparing it to the control variable.

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Which consumers live in the open ocean
Setler [38]

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Explanation: Consumers must eat other consumers or producers to survive in the open ocean. Out of the provided answer choices, swordfish, dolphins, and sharks all prey on producers or other consumers to eat.

4 0
3 years ago
How would you recognise red blood cells when looking at a colour photograph of blood taken with a light microscope?​
nirvana33 [79]

Answer:

Erythrocytes, or red blood cells, are by far the predominant cell type in the blood smear. They appear as biconcave discs of uniform shape and size (7.2 microns) that lack organelles and granules. Red blood cells have a characteristic pink appearance due to their high content of haemoglobin.

7 0
2 years ago
A student used a ruler to measure a pencil, as shown below: A pencil beside a metric ruler. The ruler is scaled from 1 centimete
NNADVOKAT [17]
Imagining the illustration where a<span> pencil is beside a metric ruler, </span>scaled from 1 centimeter to 10 centimeters, with markings for millimeters between each number and o<span>ne end of the pencil is beside the 0 on the ruler, and the pencil point is midway between the 5 and 6, we can conclude that the precise and accurate measurement of the ruler would 5.5 centimeters. Since the point is pointing in the midway of 5 and 6, we can interpret that the point is pointing in the exact half between 5 and 6 thus we can conclude that this would be a 0.5 addition to 5, giving us the 5.5 cm.</span>
7 0
3 years ago
Read 2 more answers
What is the result of dissociation of water? a) Formation of O-2 ions b) Formation of H+ and OH- ions c) Formation of H- and OH+
kati45 [8]
I think the correct answer from the choices listed above is option C. The result of the dissociation of water is  the formation <span>of H- and OH+ ions. This process is reversible which means that it could form back to water. Hope this answers the question. Have a nice day.</span>
4 0
3 years ago
True or false: articulations are places on skeleton where bones have ridges.
tatuchka [14]

im pretty sure its B. not exactly sure tho

3 0
3 years ago
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