Complex organisms, like animals, organize their body in tissues. Each tissue consists out of cells of the same type.
This cells, once having finished to differentiate, just have a couple of genes "on". So they can save energy having all the genes "off" that they don't need.
And because different tissues like the brain and the intestine need different genes to function properly, the organisms has many different cell types.
no, not all the cells in the body are the same, they are all very different as they have different functions. A nervecell looks way different than a muscle cell and so on.
All body cells have the same genes except for the sex cells (sperm and ova). They do not use the same genes. A muscle cell isn't using the same genes as a nerve cell does. Otherwise the muscle cell and the nerve cell would not be different nor do different things.
When the body is created the sperm and egg creates a stem cell. These multiply and become all cells of the body with different functions but the same DNA.
no they are not, The cell is like the body and the cell membrane is like the skin of the body
No, different cells can have different shapes depending on their function. Cells can be spherical, elongated, flat, or irregular in shape. The shape of a cell is often related to its specialized function in the body.
From a single cell after fertilization. You have the cell division by mitosis. At the time of birth, you have 100 trillion cells in your body. out of which you have 25 trillion cells are red blood cells. they do not have nucleus in them. Rest of the body cells have the same number of chromosomes as the parent cell.
Yes and no. They for the most part have the same basic organelles(organs for cells), but there are distinct differences. For example, a plant cell has a cell wall, an animal cell does not. Most cells will have a nucleus, mitochindria, and ribosomes, but will differ in appearance. What decides that is the DNA or RNA.
no. every cell is different
Adult cells could refer to any cell in the adult body. Somatic cells however, are body cells (cells that have diploid number of chromosomes), different from germ cells (containing haploid number of chromosomes)
Most cells are somatic (body) cells. The only exception is the gametes.
It depends on the type of cell. In ordinary somatic (body) cells it is the same as the parent cell. In sex cells it is half the number. Many animals and plants have numbers of chromosomes that are different from human cells numbers.
Cells are not the same due to differences in genetic information, leading to variations in structure and function. For example, specialized cells like neurons have distinct shapes and functions compared to muscle cells. Additionally, external factors such as environmental influences can also contribute to cellular diversity, resulting in different cell types like skin cells versus blood cells.