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Alona [7]
3 years ago
11

A scientist wanted to study the effect of a drug on the blood pressure of rats. She set up an experiment in which the experiment

al group consisted of rats that were injected with a salt solution containing the drug. What should the control group have consisted of?
Biology
1 answer:
Georgia [21]3 years ago
3 0
 <span>The control group would not receive any medication or they would be given the salt solution without any drugs with it (basically a placebo). 

A dependent variable is a variable dependent on another variable: the independent variable. In simple terms, the independent variable is said to cause an apparent change in, or simply affect, the dependent variable. 

The variables you have are what the rats are feed (their diet), number in cage, size of the cage (things such as a smaller care with more within it should cause undue stress), what they are exposed to within their environment. Even things sun as amount of light within the room, the temperature of the room, etc. </span>
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A person shakes up vinegar and oil dressing before pouring it on salads. what is the chemical reason for doing this
jasenka [17]

The vinegar is a charged molecule, whereas, the oil is neutral. As like dissolves like, the vinegar can be dissolved with charged molecules and the oil can be dissolved with neutrals. So, to mix vinegar and oil shaking is required.

In case, the person does not mix oil and vinegar dressing before pouring this on the salad, it would not produce a good taste, as the content of vinegar and the oil would not be appropriate.

3 0
4 years ago
Lion populations are found all over Sub-Saharan Africa. How do the sequences above reinforce or contradict the idea that populat
stealth61 [152]

Answer:

Lion populations are found all over Sub-Saharan Africa showing genetic similar lions live in same geographic areas as the DNA strands are similar to each other and they can be related to each other.

It means lions with genetic similarity can be present in the same geographic area as Lion populations are found all over Sub-Saharan Africa.

5 0
3 years ago
The outer ear consists of the _____.
Svet_ta [14]
The outer ear consists of two things and they are the auricle and the ear canal , which is also called the auditory canal.

The auditory canal  goes from the outer ear to the middle ear.

The auricle is what we see of the ear...the physical part of the ear. It can be called the pinna as well.


I hoped that this helped and good luck.
5 0
3 years ago
Read 2 more answers
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Ratling [72]

Answer:

B

Explanation:

It represents the greatest amount of cell differentiation for the newly formed organism.

Here all the organs and system get initiation and cell differentiate to form various organs.

7 0
2 years ago
How does the structure of cardiac muscle help it perform its function?
kobusy [5.1K]
The correct answer is (a.) Its spindle-shaped cells allow it to do smooth muscles. The structure of the cardiac muscles which is spindle-shaped is very important for the heart to withstand the stretching of the muscles during the contractions. Also for its smooth surface which is very important to prevent any possible blood clot during circulation.
4 0
3 years ago
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