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Agata [3.3K]
3 years ago
9

Why do many experiments make use of a control group?

Biology
1 answer:
Leokris [45]3 years ago
6 0
♥ They make use of a control group because its something that they can look into, something to compare to. <span />
You might be interested in
Select all answer choices that are
topjm [15]

Answer:

Diffusion, Facilitated Diffusion

Explanation:

Diffusion is a form of passive transport of matter across the cell membrane. Diffusion is a transport substance from the middle with already in the middle with a lower concentration until the concentrations are equalized. The magnitude of the diffusion is proportional to the chemical gradient.

Facilitated diffusion, also called carrier-mediated diffusion, is the movement of molecules across the cell membrane via special transport proteins, which are incorporated into cell membranes.

8 0
2 years ago
Using Punnett Squares, determine the percentage of offspring which would be heterozygous from the following cross: BB x bb
gogolik [260]

Lets take that the father has black hair and the mother has brown hair so -->

Male × Female

Genotypes: BB × bb

Phenotypes: Black brown

Gametes: B _100%_ b_100%_

After reviewing the photo

we have

Genotypes

B: 50% (1/2)

b: 50% (1/2)

Phenotypes

Black: 50% (1/2)

brown: 50% (1/2)

6 0
3 years ago
For a science fair project, two students decided to repeat the Hershey and Chase experiment, with modifications. They decided to
umka21 [38]

Answer is (E) : Amino acids (and thus proteins) also have nitrogen atoms; thus, the radioactivity would not distinguish between DNA and proteins.

Let me explain you why. Hershey and Chase conducted their experiment to show what is the genetic material that passes from one generation to another generation. Is it protein or DNA? For explaining this, they allowed the virus to grow in the presence of two different radio active elements.

In one set they grew viruses in the presence of P-32 radio-active element  

In another set they grew viruses in the presence of S-35 radio active element.

The reason why they choose these two radio-active element was, phosphorus is present in DNA but not in proteins and similarly sulphur is found in proteins but not DNA.

These viruses were allowed to infect bacteria and the later was observed to be radio-actively labelled with P-32 but not S-35. This clearly showed that DNA is the genetic material which was passed from virus to bacteria.  

Now if you choose Nitrogen for labeling, it won't help you in getting any conclusion since nitrogen is present in both proteins and DNA.

8 0
3 years ago
What is the difference between mitosis and meiosis? A. Mitosis produces 2 genetically unique haploid cells, while meiosis produc
AleksAgata [21]
The correct answer is C. Mitosis produces 2 genetically identical diploid cells, while meiosis produces 4 genetically unique haploid cells.

Mitosis is where a parent cell duplicates its genetic information before dividing into 2, therefore, the daughter cells from mitosis are completely identical to their parent cell and the other daughter cell, and we call the cells which has complete genetic information as diploid. Mitosis is very useful in repairing, growth, asexual reproduction etc.

Meanwhile, meiosis involves 2 times of division. The parent cell first duplicates its genetic information, but then swapping them, and divide. 2 new cells are produced. Then these 2 cells are further divided but without duplicating the genetic material. Therefore, this results in 4 genetically different cells. We call them haploid, as they only have half of the chromosomes from their parent, which is the opposite of diploid. Meiosis is important in producing sex cells.
8 0
3 years ago
The structural component(s) of the mammalian nephron where the transcytosis of water increases due to the action of anti-diureti
kipiarov [429]
 The structural components of the mammalian nephron where the transcytosis of water increases due to the action of anti-diuretic hormone is/are the collecting duct. ADH is a hormone made by the hypothalamus in the brain and stored in the posterior pituitary gland. It acts on renal collecting ducts via V2 receptors to increase water permeability, which leads to decreased urine formation. This increases blood volume, cardiac output and arterial pressure. 
7 0
3 years ago
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