"Cell" PPT courseware Simple campus recruitment activity planning plan summary enterprise and institution recruitment publicity lecture PPT template is a general PPT template for business post competition provided by the manuscript PPT, simple campus recruitment activity planning plan summary enterprise and institution recruitment promotion Lecture PPT template, you can edit and modify the text and pictures in the source file by downloading the source file. If you want more exquisite business PPT templates, you can come to grid resource. Doug resource PPT, massive PPT template slide material download, we only make high-quality PPT templates!
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Authoritative PPT Summary
"Cell" PPT courseware
Part One: History of Cell Discovery:
1. Qin and Han Dynasties: "Erya" recorded more than 590 species of animals and plants and incorporated them into a certain classification system.
2. Before the 17th century: People tried to answer the composition of plants and animals, but were limited by observation tools.
3. 1590: A Dutchman (Janssen) built the first microscope using two lenses.
4. 1665: British scientist Robert Hooke discovered cells.
5. 1831: British scientist Brown discovered that plant cells have nuclei.
6. 1840s: German scientists Schleiden and Schwann proposed the "cell theory".
Cell PPT, part 2: content of cell theory
(1) All animals and plants are composed of cells;
(2) Cells are the structural and functional units of organisms;
(3) Cells are produced by cell division.
cell
1. Shape
There are many shapes such as round, cubic, cylindrical, rhombus, polygon and so on.
2. Size
Cells are generally very small, ranging from one to tens of microns.
Cell PPT, the third part: animal cell structure and function:
cell membrane
Role: Protect cells and control material exchange between cells and the outside world
cell nucleus
Function: Contains genetic material and plays a role in passing on the family line.
cytoplasm
Function: a place for many life activities
Cell PPT, Part 4 content: Structure of plant cells:
cell wall
protect, support
(composition of cellulose)
cell membrane
chloroplast
place of photosynthesis
(Contains chlorophyll)
cell nucleus
think
1. The reason why tall trees can "stand tall on the sky and the earth" is related to what structure in plant cells?
The cell wall protects and supports cells and gives plant cells a certain shape.
2. Why are plant leaves usually green?
Plant leaf cells contain chloroplasts, which contain chlorophyll.
Cell PPT, Part 5: Practice
1. The basic structure of a cell consists of three parts: _________, _________ and _________.
2. The control center of cell life activities is ( )
A． Cell membrane B. Cytoplasm C. Cell nucleus D. vacuole
3. What parts does an animal cell include from outside to inside ( )
A. Cell wall, cell membrane, cytoplasm, nucleus
B. Cell wall, cytoplasm, nucleus
C. Cell membrane, cytoplasm, nucleus
D. Cell membrane, cytoplasm, nucleus, vacuole
4. Plant cells usually have a certain shape and are not easily deformed, mainly because ( )
A. Protective effect of cell membrane
B. Protective effect of cell wall
C. Supporting role of cell membrane
D. The supporting role of the cell wall
Keywords: Zhejiang Education Edition seventh grade science PPT courseware free download, cell PPT download, .PPT format;
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