monkey6336
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unit 2_the cell
The living things around us-plants ans animals which inhabit every part of the world-differ from non-living things because they take in food, they grow and reproduce their kind.
Animals and plants have several other aactivities which distinguish them from non-living things. the study of plants and animals is a branch of science called Biology.
If we examine a very thin piece of a plant under a microscope, we shall see that it has a honeycomb structure, it is divided into a great many small compartments called cells. Animal tissue, like plant tissue is made up of cells and in large organisms the number of cells runs into many millions.
In such organisms there are many types of cells, they differ in function and also in shape and size. Each cell is surrounded by a cell wall or a membrane, as it is generally called.
The cell walls of plants are formed of a substance called cenllulose, which gives strength to the plant. Within the cell is a thick jelly-like substance called protoplasm, which consists of a mixture of chemical compounds together with a large proportion of water. the protoplasm is colorless and similar in appearance to the uncooked white of an egg. the protoplasm consists of cytoplasm and nucleus. the nucleus is an extremely important part in the life of the cell. help me!
The living things around us-plants ans animals which inhabit every part of the world-differ from non-living things because they take in food, they grow and reproduce their kind.
Animals and plants have several other aactivities which distinguish them from non-living things. the study of plants and animals is a branch of science called Biology.
If we examine a very thin piece of a plant under a microscope, we shall see that it has a honeycomb structure, it is divided into a great many small compartments called cells. Animal tissue, like plant tissue is made up of cells and in large organisms the number of cells runs into many millions.
In such organisms there are many types of cells, they differ in function and also in shape and size. Each cell is surrounded by a cell wall or a membrane, as it is generally called.
The cell walls of plants are formed of a substance called cenllulose, which gives strength to the plant. Within the cell is a thick jelly-like substance called protoplasm, which consists of a mixture of chemical compounds together with a large proportion of water. the protoplasm is colorless and similar in appearance to the uncooked white of an egg. the protoplasm consists of cytoplasm and nucleus. the nucleus is an extremely important part in the life of the cell. help me!