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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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Which of the following fits the definition of a public good
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Answer:

something the economy can buy with its own money for own personal use

Explanation:

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when measuring the blood pressure, the cuff is deflated until two consecutive beats are heard through the stethoscope. This meas
dem82 [27]

Answer: Systolic pressure.

Explanation:

Every time the heart beats, it pumps blood into the arteries, which are vessels through which blood circulates from your heart to your tissues with the oxygen and nutrients they need. Blood pressure is the force of the blood pushing against the walls of the arteries, and is highest when the heart beats, pumping blood, which is measured as systolic pressure (i.e., when the heart contracts). On the other hand, diastolic blood pressure refers to the pressure of blood in the artery when the heart relaxes between beats (i.e., when the heart relaxes). Since there are two types of pressures, blood pressure readings are given in two numbers, with the top number being the systolic pressure and the bottom number being the diastolic pressure.  

For example, if the systolic pressure measured in a person is 125 millimeters of mercury (mm Hg) and the diastolic pressure is 85 mm Hg, the blood pressure is recorded as 125/85.  

So, <u>the systolic blood pressure is registered with the stethoscope when the cuff is deflated.</u> When two heartbeats are heard, the pressure gauge reading is recorded. <u>When the heartbeat ceases, the cuff pressure is released and the diastolic pressure is measured at this time.</u>

4 0
3 years ago
How does the potential volume of the pleural sacs change during inhalation?
exis [7]

<span>Pleural sac is a two layered membrane formed when a serous membrane known as pleura folds back onto itself. Thus, the pleura invest the lungs and line the walls of the thoracic cavity. However, the potential volume of the thoracic cavity increases during inhalation.</span>

4 0
3 years ago
These two cells have several features in common. They also differ in several ways. The two cells share all but one feature liste
Kobotan [32]

Answer:

The correct answer would be B) enclosed in a protein capsule

Almost all living cells contain DNA as their genetic material. DNA control and coordinates the function of the cell. The two cells also must contain the DNA.

Cellular respiration refers to the set of biochemical reactions by which the cell generates ATP or energy. All the living cells produce energy through cellular respiration, however, they may utilize the aerobic or anaerobic form of respiration.

A ribosome is found in all the living cells including animal cells, plants, bacteria et cetera. They form the site for protein synthesis in all the cells.

The protein capsule is not a universal feature of all living cells. Thus, it may be present in one cell type and absent in another cell type.

6 0
3 years ago
Read 2 more answers
Which characteristic makes fungi similar to plants?
beks73 [17]

<span>The answer is D. Both fungi and plants can grow in soil.</span>

<span>
Through the process of elimination:
- Plants are autotrophic organisms while fungi are heterotrophic organisms.
- Plants have vascular tissue, and fungi don't.
- Fungi are the only organisms that have cell walls made of chitin.
Therefore, the correct choice is that both fungi and plants can grow in soil.</span>

6 0
3 years ago
Read 2 more answers
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