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Marina CMI [18]
3 years ago
11

Why is a parent usually a better match for transplanted tissue to a donor than a random individual of the same species?

Biology
1 answer:
s344n2d4d5 [400]3 years ago
7 0

Answer: For decreased chances of rejection

Explanation:

The three higly polymorphic MHC 1 genes in human beings are HLA-A, HLA-B and HLA-C.

These determine the compatibility of the organ or tissue in the recipient's body each by the help of many alleles that segregates in a population.

There are very less chances that a random chosen donor will match the a recipient six allele genotype.

This is the reason parent  may be the best donor for organ transplantation or tissue transplantation.

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Explain why it is that translation cannot happen, unless transcription happens first.
Aleks [24]

Answer:

Translation uses DNA as a template to direct the synthesis of a RNA which in turn serves as a template for Translation which template is used to direct the synthesis of a polypeptide chain.

Without transcription, there will not be a mRNA strand to act as a template for translation by the ribosomes to occur at all.

5 0
3 years ago
What are four characteristics of a good extraction solvent?
ella [17]

A good extraction solvent should have a strong solubilizing capability for the compound of interest, it should be immiscible or only weakly misciblewith the matrix solvent ( the first solution or mixture containing the compound from its natural source, e.g., water/ether. water/ chloroform, etc. If possible the extraction solvent should be non-flammable, non-toxic or of low toxicity, reasonably volatile, and of low eco-impact. Inexpensive and available, of high purity , and shelf stable. If one is determining the compound of interest by UV/Vis spectrophotometry or fluorescence, the solvent should have extremely low absobance or emission at the wavelength of analysis

• high solubility for the solute and low solubility for the carrier liquid.

• density difference vs. the carrier liquid greater than 150 kg/m. ...

• mid-level interfacial tension (5–30 dyne/cm)

• high resistance to thermal degradation.


4 0
3 years ago
Select the correct answer. what primarily determines the carrying capacity of a population? a. birthrate b. death rate c. biotic
sasho [114]

Biotic and abiotic limitations determine the carrying capacity of a population.

<h3>What is carrying capacity?</h3>

Carrying capacity is defined as the maximum number of individuals that an environment can sustain without destroying the environment. It is determined by various factors such as food availability, water, and space.

So we can conclude that Biotic and abiotic limitations determine the carrying capacity of a population.

Learn more about capacity here:brainly.com/question/1464531

#SPJ3

8 0
2 years ago
Identify the four postulates of natural selection. select all that apply.
Naddika [18.5K]
Here are the four postulates of natural selection, according to Charles Darwin:
1. variability - refers to different mutations that create different species
2. heritability - refers to the genes that are passed from one organism onto its descendants
3. overproduction of offspring - refers to the fact that more "children" is born than dies
4. natural selection - refers to those organisms that survive because they adapt to their surroundings better than those who will die
6 0
3 years ago
15 POINTS!!!! PLEASE HELP!!!!!!!
guajiro [1.7K]
I think its B. Im not sure
3 0
3 years ago
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