The answer is A. Each channel accepts only one type of molecule to pass through
Answer:
Carbon is the foremost common element on Earth. Carbon can form a wide assortment of molecules.
Cancer cells can arise in a variety of ways, the most common, however, tends to be genetic mutations.
Genetic mutations can occur during the life of a cell due to outside factors such as:
- The <u>food </u>we eat
- The <u>environment </u>we expose the cell to
- The <u>substances </u>that touch the cell (e.g skin cells)
That being said, the most common time for a genetic mutation to take place is during cellular division. During this time the DNA that encodes the cells is duplicated. Genetic mutations in this DNA sometimes cause the elimination of <u>programmed cell death</u>.
<u>Programmed cell death </u>is what tells a cell when it should stop growing and dividing. This is a <u>regulatory function </u>designed to keep the number of cells at a balance, growing only when needed. As this cell multiplies, this produces an increasing number of cells that will not die. The <u>accumulation </u>of these cells is referred to as cancer.
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- Rough Endoplasmic Reticulum.
- Chloroplast.
- Cell wall.
- Mitochondria.
- Vacuole.
- Membrane
- Golgi Apparatus.
- Nucleus
- Nucleolus.
The cell in the diagram is a plant cell because it has chloroplasts and a cell wall.
There are two types of cells animal cells, which are the ones that humans and animals have, and plant cells, which are the ones that plants and trees have. They share some organelles, but they also have some that are specific to each type.
The plant cell parts in the picture are:
- Rough Endoplasmic Reticulum: it is where the ribosomes are. The synthesis of proteins happens there.
- Chloroplast: it is an organelle-specific of plant cells. They are in charge of photosynthesis.
- Cell wall: it is only present in plant cells. It surrounds the membrane.
- Mitochondria: It is the place that generates the energy that the cell needs.
- Vacuole: they are bigger in cell plants than in animal plants. It has many functions, but one is to store water.
- Membrane: it draws the limits of the cell.
- Golgi Apparatus: it is the place where proteins go to be distributed.
- Nucleus: it contains DNA, and it has a membrane around it.
- The nucleolus: is the larger part of the nucleus. It is in contact with the endoplasmic reticulum.
To sum up, the plant cell has a bigger vacuole than the animal cell; it also has chloroplasts and a cell wall, which are not present in the animal cell.
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