The cell wall is a tough and rigid layer that surrounds some types of cells. It is located outside the cell membrane and its main function is to provide rigidity, strength, protection against mechanical stress and infection. It can also provide the cell with limited plasticity that will prevent the cell from rupturing due to turgor pressure.
<span>Epithelial tissue is densely packed cells that used most in the area where protection is needed. This cells mostly used in skin, some with more keratin which will increase their ability to protect. In bone, the main protective layer is calcium mineral which was deposited by osteocytes. Because this bone doesn't really need more epithelial cells. Bone tissue only needs a good vascularization and connective tissue to support it.
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Answer:
Well several things, during sexual reproduction, by which DNA is passed from one generation of cells to the next. Also, bacteria use double-stranded DNA as their genetic material. So therefore there are 3 ways that genetic information is exchanged:
Conjugation, Transformation, and Transduction.
In conjugation, DNA passes through an extension on the surface of one bacterium and travels to another bacterium (Figure below). Bacteria essential exchange DNA via conjugation. In transformation, bacteria pick up pieces of DNA from their environment. In transduction, viruses that infect bacteria carry DNA from one bacterium to another.
Answer:
The early Earth was very different from our Earth today.
Explanation:
Earth's first atmosphere had lots of water vapor but had almost no oxygen. Later, frequent volcanic eruptions put several different gases into the air (Figure 12.13). These gases created a new type of atmosphere for Earth.
1) It could lead to the cure of cancer which would save so many lives.
2) It would lead to discoveries on different illnesses and possibly how to treat them.
