"Plant Cell Structure and Function" PPT courseware

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"Plant Cell Structure and Function" PPT courseware

Part One: Experimental Observation

Observation: Structure of onion scale leaf epidermal cells

1. Make temporary slide specimens

Precautions:

⑴ An appropriate amount of water should be dropped in the center of the slide, 1 to 2 drops is enough, not too much.

⑵ Cover the coverslip to avoid bubbles.

⑶ The torn epidermis should not be too large. The length and width are each 0.5cm.

2. Dyeing

⑴ What is the purpose of dyeing? To facilitate observation

⑵ Time of staining (before or after coverslip)?

⑶ What is the dyeing method?

Put a drop of iodine solution on one side of the coverslip and absorb it with absorbent paper on the other side. Repeat 2 to 3 times.

3. Observe

(The operation of the microscope must be scientific and standardized)

4. Draw pictures

Plant cell structure and function PPT, Part 2: Function of plant cells

cell wall

Located in the outermost layer of plant cells

It has the function of protecting the internal structure of cells and maintaining the normal shape of cells.

cell membrane

Function: Control the entry and exit of substances inside and outside the cell, and protect the relative stability of the internal environment of the cell.

cytoplasm

Function of cytoplasm: an important place for life activities

The cytoplasm includes: mitochondria, chloroplasts, endoplasmic reticulum, ribosomes, Golgi apparatus, centrosomes, vacuoles, etc.

Mitochondria

①Structure:

adventitia

The intima and some parts fold inward to form ridges

matrix

②Substances contained inside

There are many respiratory enzymes

Small amounts of DNA and RNA

③Function: The main place for aerobic respiration. "Power Factory"

Plant cell structure and function PPT, Part 3 content: Questions:

1. When observed under a microscope, onion epidermal cells are relatively regular and polyhedral cells. What is the main structure that allows cells to maintain this regular shape?

2. What is the structure that allows beneficial substances to enter but prevents harmful substances from entering?

3. What is the juice that comes out when we eat watermelon? From which structure in the cell?

4. Where is the main place for life activities? What structures in this structure are involved in photosynthesis and respiration in plants?

5. In what structure of cells does genetic material exist?

Keywords: Jiangsu Education Edition seventh grade biology PPT courseware free download, plant cell structure and function PPT download, .PPT format;

For more information about the PPT courseware "Cells are the basic unit of life activities. Plant cell structure and function", please click on the "Cells are the basic units of life activities" PPT plant cell structure and function PPT tag.

"Plant Cell Structure and Function" PPT:

"Plant Cell Structure and Function" PPT Part One Content: Classroom Activities Activity 1: Observation Experiment Observation: The structure of onion scale leaf epidermal cells Experiment purpose: Identify the basic structure of plant cells Experimental equipment: microscope, glass slide, cover glass, tweezers,..

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Update Time: 2024-11-13

This template belongs to biology courseware Jiangsu Education Edition Seventh Grade Biology Volume 1 industry PPT template

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