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olchik [2.2K]
3 years ago
11

What is the purpose of using multiple control groups in an experiment

Biology
2 answers:
mamaluj [8]3 years ago
6 0

Answer:

The independent variable is "controlled" or held constant in the control group. A single experiment may include multiple experimental groups, which may all be compared against the control group. The purpose of having a control is to rule out other factors which may influence the results of an experiment.

Explanation:

Mariulka [41]3 years ago
5 0

Answer:

Explanation:

A control group is a standard group which is used for the purpose of the experiment. It does not receive any manual treatment by the experimenter. Instead it is kept as a standard for comparison of the other variables.

The multiple control groups are used in the experiment so as to increase the accuracy, consistency and reliability of the results. As if one control group contains contaminants it may produce errors in the experiment. To avoid error and enhance error and increase accuracy multiple control groups are used.

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3. How do floods affect the environment? Select all that apply.
Tcecarenko [31]

Floods affect the environment by destroying building, creating areas of more fertile soil and speeding up the weathering of rock.

Answer: Option A,B & C

<u>Explanation:</u>

Floods obviously destroy every building on its way ruining the whole place taking away the lives of people and stock. But the flood also carries many nutrients along it’s way which creates areas of more fertile soil.

Unexpected floods enter into the holes of the rock and during winter it transforms into ice and causes crack in the rock. The flood water gushing fast normally breaks down the corners of the rock hence causing weathering of rock.

4 0
2 years ago
Connie needs to choose a current event to write about for the school newspaper. Her teacher would also like the article to inclu
fenix001 [56]
D would be the answer because it’s more logical in a way than the others.
8 0
3 years ago
In the cells of most organisms, genetic information is contained in the:
xz_007 [3.2K]

Answer:

The nucleus

Explanation:

Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA). Mitochondria are structures within cells that convert the energy from food into a form that cells can use.

Hope this helps!

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6 0
3 years ago
As a molecule moves through the plasma membrane it passes through a hydrophobic layer of phospholipid tails then a hydrophilic l
Firdavs [7]

Answer:

"As a molecule moves through the plasma membrane it passes through <em>a hydrophilic layer of phospholipid heads then a hydrophobic layer of phospholipid tails and then another hydrophilic layer of phospholipid heads".</em>

Explanation:

Biological membranes are formed by two lipidic layers, proteins, and glucans.

Lipids characterize for being amphipathic molecules, which means that they have both a hydrophilic portion and a hydrophobic portion at the same time. These molecules have a lipidic head that corresponds to a negatively charged phosphate group, which is the polar and hydrophilic portion. They also have two lipidic tails that correspond to the hydrocarbon chains -the apolar and hydrophobic portion- of the fatty acids that esterify glycerol.

Membrane lipids are arranged with their hydrophilic polar heads facing the exterior and the interior of the cells, while their hydrophobic tails are against each other, constituting the internal part of the membrane.

Through this lipidic bilayer, some molecules can move from one side of the cell to the other, which happens because of concentration differences. When this occurs, molecules must pass through the hydrophilic layer of phospholipid heads then through the hydrophobic layer of phospholipid tails and then again through another hydrophilic layer of phospholipid heads.              

3 0
3 years ago
One feature that amphibians and humans have in common is
Ipatiy [6.2K]

Answer:

Both have two circuits for circulation.

Explanation:

  • The two circuits of circulations are known as the systemic circuit and the pulmonary circuit.
  • In the<u> systemic circuit</u>  oxygenated blood from the heart is pumped to all parts of the body through the blood vessels and then the blood is pumped back to he heart.
  • In the<u> pulmonary circuit</u>  deoxygenated blood from all parts of the body is pumped from the heart to the lungs to be oxygenated and after it is oxygenated it is pumped back to the heart.
8 0
3 years ago
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