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inysia [295]
3 years ago
8

History: When did stem cell research become known? Who discovered stem cells? What experiments or studies have been conducted so

far?
Biology
2 answers:
Fofino [41]3 years ago
5 0

In 1963 James Edgar Till discovered that bone marrow transplanted cells in the spleen of mice self-replicated. With the research, Canadian scientist James Edgar Till discovered stem cells that have become a known and controversial subject ever since.

From this, stem cells have become the subject of numerous studies and experiments, and are the main subject of many debates. Experiments have already been performed that tested the influence of stem cells in cancer treatments, cloning, chronic disease treatments, experiments that evaluate the possibility of organ transplantation from animals to humans, tumor treatment, among others.

Several segments of the population have taken a position contrary to this type of research, as they claim that the good of society cannot be obtained from the death of some individuals, even if still in the embryonic stage. The Roman Catholic Church, as well as Protestant churches has defended this position, also accepted by many unrelated scientists and philosophers, that a person's life begins with fertilization, so there is no ethically adequate justification for such research. .

avanturin [10]3 years ago
3 0

Answer:

The stem cells was discovered by Ernest McCulloch and James Till in 1981. Studies conducted for stem cells can be used for bone marrow transplantation and to treat various diseases.

Explanation:

Stem cell are the cells that has the ability to differentiate into different cells of the body. In 1978 human cord blood discovered as stem cell. The stem cell research come to known in 1981.

Ernest McCulloch and James Till discovered the stem cell research while working on the mice bone marrow. He found that the different blood cells were formed by the single class of cells.

Experiments on mice and other animals have been conducted to study the stem cells so far. The study of stem cell is useful to cure the genetic defects, Cancer and other harmful diseases.

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Does heating a cup of water allow it to dissolve more sugar? Tempature if the water is measured in degrees centigrade. Amount of
HACTEHA [7]

The changing quantities in an experiment are called variables. A variable refers to any trait, factor, or a condition, which can prevail in distinct amounts or kinds. An experiment generally exhibits three kinds of variables: independent, dependent, and controlled.

The independent variable refers to the one, which is modified. On the other hand, the dependent variable is implied to observe that how it reacts with the change made to the independent variable. The controlled variables refer to the quantities, which one wants to remain constant.

In the given case, that is, heating a cup of water to witness that whether the sugar will get more easily dissolve. In this, the independent variable refers to the temperature of the water determined in degrees Centigrade. The dependent variable refers to the amount of sugar, which dissolves completely measured in grams.

In this, the controlled variables are stirring and type of sugar. As more stirring might elevate the amount of sugar that dissolves, and different kind of sugars might dissolve in distinct concentrations. So, in order to make sure a fair test, there is a need to keep these variables similar for each cup of water.


4 0
2 years ago
Why do we group artworks with similar characteristics into periods or styles?
fgiga [73]
We group artworks with similar characteristics into periods or styles because it is easiest to do it that way - this way we can find common characteristics in these literary/artistic eras, and name them. For example, the Renaissance had a distinct style, which differs greatly from that of Romanticism. 
7 0
3 years ago
Read 2 more answers
What is the role of tRNA during translation?
Anika [276]

Answer:

B. It provides the code for the protein

Explanation:

3 0
2 years ago
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Describe the process of preparing salad of your choice ​
suter [353]

Answer:

1.get everything that u want 2. yeet it in a bowl 3.mixit up and serve(if need to cut anything up, do that.)

Explanation:

6 0
3 years ago
You have identified a mutation in a gene that seems to decrease transcription of another gene 2000 bp away from the mutation sit
Reil [10]

Answer:

Enhancer sequence.

Explanation:

Enhancers may be defined as the transcription factors that are used to enhance or increase the activity of the gene. Enhancers bind with the transcription factors to regulate and increase its expression.

The mutation in the enhancers decrease the transcription of  of the other gene. These sequences lies far away from the transcription site but still known to increase the rate of transcription. Hence, the mutation has been done in the enhancer sequences.

Thus, the correct answer is option (b).

7 0
3 years ago
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