Answer:
In eukaryotes, nucleosomes play major roles in chromatin organization and gene expression
Explanation:
In eukaryotic organisms, chromosomal DNA is packaged with the help of proteins called 'histones' to form chromatin. The nucleosomes represent the basic packing units of the chromatin. Each nucleosome is composed of a histone octamer containing each two histones H2A, H2B, H3 and H4 wrapped around by 147 bp of DNA. Nucleosomes act as scaffolds to form higher-order chromatin structures (i.e., 30-nm chromatin fibers and condensed chromosomes). Moreover, nucleosome histone proteins can be chemically modified at defined amino acid residues, and thus nucleosomes also provide an epigenetic layer of information that can promote or inhibit gene expression.
The independent variable are the different types of sugar solutions: maltose, glucose, and sucrose.
<h3>What are variables in an experiment?</h3>
A variable is any factor in an experiment that can be manipulated, controlled for, or measured.
There are three types of variables in an experiment:
- Dependent variable
- Independent variable
- Constant variable
An independent variable is the variable that stands alone and is not affected by other factors in the experiment. Changes in this variable results in changes in the dependent variable.
In the given experiment, the independent variable are the different types of sugars.
In conclusion, changes done to the independent variable results in changes in the dependent variable.
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Answer:
DNA and Mutations. A mutation is a change in DNA, the hereditary material of life. ... So a change in an organism's DNA can cause changes in all aspects of its life. Mutations are essential to evolution; they are the raw material of genetic variation.
Explanation:
Answer:
The correct answer is option A. "Abdominal radiograph".
Explanation:
Abdominal radiograph, or abdominal x-ray, is a diagnosis tool at which an image of the abdominal cavity is obtained based on the exposure of a small dose of ionizing radiation. The patient described in the question could be suffering from different conditions based on its symptomatology. The first tool to help to make a proper diagnosis is to perform an abdominal radiograph, to see any internal evidence of the possible cause of the occasional bloody diarrhea and abdominal pain.