"Cells produce new cells through division" How cells constitute organisms PPT courseware 2

Description

"Cells produce new cells through division" How cells constitute organisms PPT courseware 2

Review the past and learn the new

1. Cells control the development and inheritance of organisms is ______. Genetic information is ______. (DNA)

2. Taken together, the substances contained in cells include ______ and ________.

3. The basic unit of structure and function of living organisms is ______.

4. ____ and ____ are energy converters in cells.

5. ____ controls the entry and exit of substances.

What to study?

1. Describe the basic process of cell division;

2. Tell me what a chromosome is?

3. The result of chromosomal changes during cell division.

4. Explain the relationship between cell division and biological growth.

2. Cell division:

Chromosome: Made up of two substances, DNA and protein. DNA is genetic material, so chromosomes are the carriers of genetic material.

Consolidate and practice

The most important changes in cell division are

What? ( )

What does this change mean? ( )

1. Nuclear fission

2. Qualitative division

3. Membrane formation (or new cell wall)

Chromosome changes during cell division:

1. Copy first (double)

2. Redistribute equally

result------

1. The chromosome shape and number of the two new cells are the same.

2. The new cells have the same chromosome shape and number as the original cells.

Class exercises

1. Plants grow from small to large because ()

A. The result of cell division and differentiation

B. The result of cell division and growth

C. Result of cell growth and differentiation

D.The result of cell division

2. The correct order of cell division is ( )

①The cell nucleus changes from one to two

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

③A new cell membrane is formed in the center of the original cell, and plant cells also form cell walls.

A, ① ② ③ B, ③ ② ①

C. ② ① ③ D. ① ③ ②

3. Comparing the genetic material contained in the new cells produced by onion root tip cell division with the original cells ( )

A. Half of the original cell

B. Same as original cells

C. Twice the size of the original cell

D. Unsure

2. Multiple choice questions:

1. During cell division, the structures evenly distributed into the two cells are:

A. Cell membrane B. Cytoplasm C. Nucleus D. Chromosome

2. An organism grows from small to large as a result of.

A. Increase in cell volume B. Increase in number of cells

C. Cell division and cell growth D. Cell division or cell growth

3. The correct order of the following steps of cell division is:

①The cytoplasm is evenly divided into two parts ②The replicated chromosomes enter two new nuclei respectively ③A new cell membrane is formed

A, ①②③ B, ③②① C, ②①③ D, ②③①

4. There are 46 chromosomes in the human cell nucleus. After two cell divisions, four cells are formed. The number of chromosomes in each cell is:

A. 92 items B. 46 items C. 23 items D. Unsure

Keywords: How do cells constitute an organism teaching courseware, cells produce new cells through division teaching courseware, People's Education Edition seventh grade biology PPT courseware download, seventh grade biology slide courseware download, how cells constitute an organism PPT courseware download, cells pass Download the PPT courseware of division to produce new cells, in .PPT format;

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..

File Info

Update Time: 2024-10-22

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

Preview