"Cells produce new cells through division" PPT courseware on how cells constitute organisms

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"Cells produce new cells through division" PPT courseware on how cells constitute organisms

[Review of old knowledge]

1. What substances are in cells? Give examples respectively.

2. In the process of cells obtaining materials and energy from the outside world, what are the roles of cell membranes, chloroplasts and mitochondria?

3. What is the main function of the cell nucleus?

cell growth

The cells that make up an organism must constantly absorb nutrients from the surrounding environment and convert them into substances that make up themselves. The size will change from small to large. This is the growth of cells.

Can cells, the basic units of structure and function of organisms, grow without limit?

Some cells will stop growing when they reach a certain size; some cells will divide. Cell division is the division of one cell into two cells.

The process of plant cell division:

1. The cell nucleus is first divided into two.

2. The cytoplasm is divided into two parts, each part contains a nucleus.

3. In the center of the original cell, a new cell membrane and a new cell wall are formed.

The process of animal cell division:

1. The cell nucleus is first divided into two.

2. The cytoplasm is divided into two parts, each part contains a nucleus.

3. The cell membrane dents inward from the middle of the cell and splits into two cells.

To prevent cancer, you should:

1. Don’t smoke and drink less alcohol

2. Eat less pickled, grilled and high-fat foods

3. Eat more whole grains, green vegetables and fruits

4. Do not eat moldy or spoiled food

5. Avoid excessive sun exposure and exercise moderately

In-person testing

1. The increase in cell volume depends on ( )

A. Cell division B. Cell growth

C. Cell division and growth D. Cell differentiation

2. The growth of an organism from small to large is the result of which of the following processes ( )

A. Cell division B. Cell growth

C. Cell division and growth D. Cell canceration

3. After human skin cells divide, the number of chromosomes in the newly generated cells is compared with the original cells ( )

A. Reduced by half B. Doubled

C. Some become more, some become less D. No change

4. A certain organism’s cells contain 12 pairs of chromosomes. In the cells formed after cell division, the number of chromosomes is ( )

A.12 items B.24 pairs C.12 pairs D.6 pairs

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For more information about the PPT courseware "How cells make up living organisms. Cells divide to create new cells." Please click on the How cells make up living organisms ppt. Cells divide to create new cells ppt tag.

"Cells produce new cells through division" How cells constitute organisms PPT courseware 6:

"Cells produce new cells through division" How cells constitute living organisms PPT courseware 6 Review the past and learn the new 1. Inorganic substances and organic substances in cells 2. Cell membranes control the entry and exit of substances 3. Chloroplasts (the place of photosynthesis), the energy converters in cells Light energy change..

"Cells produce new cells through division" How cells constitute organisms PPT courseware 5:

"Cells produce new cells through division" How cells constitute organisms PPT courseware 5 1. Teaching objectives 1. Describe the basic process of cell division. 2. Say that the number of cells in an organism increases through cell division. 3. Name the roles of chromosomes before cell division..

"Cells produce new cells through division" How cells constitute organisms PPT courseware 4:

"Cells produce new cells through division" How do cells constitute an organism PPT courseware 4 1. Cell growth Cell growth: The cells that constitute an organism must constantly absorb nutrients from the surrounding environment and convert them into their own substances. The volume will change from Small becomes big. reason..

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Update Time: 2024-09-27

This template belongs to biology courseware People's Education Edition seventh grade biology volume 1 industry PPT template

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