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VLD [36.1K]
3 years ago
14

In an experimental design, a(n) ____________ group is not exposed to the treatment, and this allows a researcher to identify any

effects of the experiment that are not caused directly by the treatment.
Biology
1 answer:
PolarNik [594]3 years ago
3 0

Answer: normal

Explanation:

In experimental design, especially those involving drug treatment, specimens (e.g mice, rabbit etc) are drafted into several groups to study their degree of response to the particular drug being investigated.

Of all, a group of specimens named NORMAL is usually NOT exposed to treatment in order to

- allow objective comparison between scientific parameters before and after experiments

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erica [24]

Answer:

<h2>6. A. LATITUDE</h2><h2>7. C. ANTARCTIC CIRCLE</h2><h2>8. D. Topsoil, Subsoil, Parent material</h2>

Explanation:

6. Latitude is the measurement of distance north or south of the Equator. It is measured with 180 imaginary lines that form circles around the Earth east-west, parallel to the Equator. These lines are known as parallels

7. These zones are found in the North and South Poles. The South Frigid Zone is located between the Antarctic Circle and the South Pole, and the North Frigid Zone is located between the Arctic Circle and the North Pole.

8. As we know that the first layer of soil is topsoil , the middle layer of soil is subsoil and after the sub soil there is bedrock. Therefore, the correct arrangement of layers is top soil, subsoil, bedrock.

<h2>ihopeihelpsu</h2>
6 0
2 years ago
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Which features of the sun are typical of stars
Reika [66]

Answer: Hope it helps!

Explanation:

Describes the surface features of the Sun, including sunspots, solar prominences, solar flares, and coronal mass ejections.

4 0
2 years ago
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Which term identifies a reaction that breaks apart macromolecules?
choli [55]

The correct answer is hydrolysis.

Hydrolysis refers to a chemical reaction in which water is utilized to dissociate the bonds of a specific substance. In practical terms, hydrolysis signifies the work of distinguishing chemicals when water is added.

Hydrolysis can also be considered as the reverse reaction to condensation that is the method in which two molecules merge to produce one bigger molecule.

8 0
3 years ago
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Rh blood factor is determined by:
Svet_ta [14]

Answer: Rh boold factor is determined by the presnce or absence of a particular erythrocyte protein

Explanation:

The Rh factor is an integral protein of the membrane of red blood cells (erythrocytes) and, by its determination, the blood type RH + or RH- is detected, -regardless of the types of groups known as 0, A, B and AB- .

People who are  RH + are those who have this protein in their red blood cells, and people with RH - refer to those who do not have the protein.

The Rh factor (Rhesus) was discovered by Karl Landsteiner and Wiener in 1940.

----------------------

I hope it is useful for you!. Regards. María

3 0
2 years ago
What determines whether a particular cell is able to respond to a hormone? What determines whether a particular cell is able to
Zielflug [23.3K]

Answer:

<u><em>The correct option is the presence of a specific hormone receptor.</em></u>

Explanation:

Every cell membrane contains certain cell surface receptors which detect an extracellular molecule and allow it to perform function inside that particular cell. The cell surface receptors receive and transmit signals.

For a specific hormone to function inside a particular cell, the cell must possess a specific hormone receptor embedded in the plasma membrane which will detect the hormone and allow it to function inside the cell.

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