Answer:
When sulfurous, sulfuric, and nitric acids in polluted air and rain react with the calcite in marble and limestone, the calcite dissolves. In exposed areas of buildings and statues, we see roughened surfaces, removal of material, and loss of carved details. Stone surface material may be lost all over or only in spots that are more reactive.
Explanation:
You might expect that sheltered areas of stone buildings and monuments would not be affected by acid precipitation. However, sheltered areas on limestone and marble buildings and monuments show blackened crusts that have peeled off in some places, revealing crumbling stone beneath. This black crust is primarily composed of gypsum, a mineral that forms from the reaction between calcite, water, and sulfuric acid. Gypsum is soluble in water; although it can form anywhere on carbonate stone surfaces that are exposed to sulfur dioxide gas (SO2), it is usually washed away. It remains only on protected surfaces that are not directly washed by the rain.
The technology that was used to produce the results illustrated in the image is gel electrophoresis and it is used for separating deoxyribonucleic acid (DNA) fragments.
Gel electrophoresis can be defined as a technology that is used in the laboratory for the separation of mixtures of deoxyribonucleic acid (DNA), ribonucleic acid (RNA) or other macromolecules such as proteins based on molecular size and charge.
In gel electrophoresis, an electric current is applied to the deoxyribonucleic acid (DNA) samples so as to create fragments that can be used to compare the various samples of deoxyribonucleic acid (DNA).
The steps involved in gel electrophoresis include the following:
- Extraction of deoxyribonucleic acid (DNA).
- DNA isolation and amplification.
- Addition of deoxyribonucleic acid (DNA) to the gel wells.
- Application of an electric current to the gel.
- The separation of DNA bands based on molecular size and charge.
- Deoxyribonucleic acid (DNA) bands are stained.
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Answer:
Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. The process results in four daughter cells that are haploid, which means they contain half the number of chromosomes of the diploid parent cell.
The list of <span>not correctly paired parasympathetic outflow </span><span>would be:
1. nerves coming from the sacral section innervate lungs and heart
</span><span>2. vagus nerve stimulates many glands in the head like lacrimal and salivary glands
</span><span>
Sacral region is located in the tailbone, near the hip. The location itself too far from lungs and heart, which actually nerved by vagus.
</span>Lacrimal and salivary glands are nerved by the submandibular (cranial VII) and glossopharyngeal(cranial IX), not vagus(cranial X)
