The movement of the eardrum causes the bones of the middle ear (the ossicles) to vibrate. These vibrations then pass into the cochlea, the organ of hearing. Within the cochlea, the hair cells on the sensory epithelium of the organ of Corti bend and cause movement of the basilar membrane.
Answer:
Prokaryotic cells are simple cells whereas Eukaryotic cells are large and complex cells.
Explanation:
- There is difference between the prokaryotic cells and eukaryotic cells in its structure and functions.
- Prokaryotic cells lack well defined nucleus but contain DNA molecules called as nucleoid. whereas, Eukaryotic cell contains a well defined nucleus.
- Prokaryotic cell is a single-cell and contains only one chromosome whereas eukaryotic cell is a multicellular which contains many chromosomes.
- Features like growth, response and reproduction is present in both type of cell.
Mass and distance
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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.
If a person is shot, and the bullet destroys the part of the brain called the medulla, which maintains basic life functions (heart rate, breathing), there is virtually no chance for surviving that injury
