"Plant Cell" Cell is the basic unit of life activities PPT courseware

Description

"Plant Cell" Cell is the basic unit of life activities PPT courseware

Situation import

After Mengmeng learned how to use a microscope, she wanted to see what real cells looked like. She placed a spinach leaf on the stage of the microscope and followed the instructions for using the microscope, but she could not see the spinach cells.

Why didn’t Mengmeng observe the cells? Can you help her solve this problem?

learning target

1. Understand the types of slide specimens.

2. Learn the basic methods of making temporary plant cell slides.

3. Understand the basic structure of plant cells by observing the temporary slides made by yourself; learn to draw a simplified diagram of plant cell structure.

Slide specimen type

Ask students to study relevant content on their own and think about the following questions:

1. In order to see the object being observed clearly, what conditions should the material being observed meet?

2. What are the types of slide specimens? How to differentiate?

1. Material requirements

In order to see clearly the object being observed, what conditions should the material being observed meet?

2. Types of slide specimens

Slices made from thin slices cut from biological material

Smear made of liquid biological material that has been smeared

Mounted films are made from small amounts of biological material torn or picked from living organisms.

(Very tiny organisms can be directly made into mounted films)

Observe plant cells

Please read the relevant content:

1. Understand the purpose and requirements of the experiment, materials and tools, and method steps.

2. Try to complete the production of temporary slides by hand, and try to draw a simplified diagram of onion cells seen under a microscope.

3. Understand the basic structure of plant cells.

Experiment: Make and observe temporary plant cell slides

Purpose requirements:

Make temporary mounts of plant cells and learn the basic methods of making temporary mounts.

Understand the basic structure of plant cells.

Practice drawing a simplified diagram of the cell structure.

Materials and tools:

Onion scale leaves, fresh cucumber, Vallisneria or black algae, water, iodine solution, tweezers, razor blade, dropper, gauze, absorbent paper, slides, coverslips, microscope.

3. Observe temporary film installation

Carefully observe the prepared temporary mount of plant cells under a low-magnification microscope (a combination of eyepieces and low-magnification objective lenses).

4. Practice drawing simple diagrams of cell structures

According to the object image observed under a low-magnification microscope, select one of the cells and draw the observed parts of the structure. Only outline the surrounding cells.

Notice:

Appropriate size, upper left; draw with pencil; dark areas in the picture are represented by fine dots;

The text description should be drawn out with a horizontal line and annotated on the right side of the figure; the title of the figure should be written below the figure.

Standard training

1. In order to prevent or reduce the generation of bubbles in the temporary mounting slide, the cover slip should be ( )

A. Place the coverslip flat on the slide

B. Add a few drops of water beforehand

C. Let one side of the cover slip touch the water droplet on the slide, and press it hard

D. Let one side of the coverslip touch the water droplets on the slide and lay it flat gently

2. In plant cells, the structure that supports and protects cells is ( )

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

3. Use a microscope to observe the epidermal cells of onion scales and tomato pulp cells. In the field of view, the former ( )

A. Closely arranged and oval

B. Closely arranged and rectangular

C. Loosely arranged and oval

D. Loosely arranged and rectangular

4. The structure of plant cells from outside to inside is ( )

A. Cell membrane, cell wall, nucleus, cytoplasm

B. Cell wall, cell membrane, cytoplasm, nucleus

C. Cell wall, cell membrane, nucleus, cytoplasm

D. Cell wall, nucleus, cell membrane, cytoplasm

5. When observing the temporary mounting film, if you see a circle with a bright center and a dark periphery in your field of vision, the circle may be ( )

A. Dirt B. Bubbles C. Cells D. Ink

Keywords: Cells are the basic unit of life activities teaching courseware, plant cell teaching courseware, People's Education Edition seventh grade biology PPT courseware download, seventh grade biology slide courseware download, cells are the basic unit of life activities PPT courseware download, plant cells PPT courseware download, .PPT format;

For more information about the PPT courseware "Cell is the basic unit of life activity, plant cell", please click on the cell is the basic unit of life activity ppt plant cell ppt tag.

"Plant Cell Structure and Function" PPT courseware:

"Plant Cell Structure and Function" PPT Courseware Part One Content: Experimental Observation Observation: Structure of Onion Scale Leaf Epidermal Cells 1. Precautions for making temporary glass specimens: ⑴ An appropriate amount of water should be dropped in the center of the glass slide, 1 to 2 drops Just enough, not too much. ⑵..

"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, slide, cover glass, tweezers,..

"Plant Cells" Cells are the basic units of life activities PPT courseware 6:

"Plant Cells" Cells are the basic units of life activities PPT courseware 6 1. Experiment purpose 1. Make temporary transfers of plant cells. 2. Learn the basic methods of making temporary transfers. 3. Understand the basic structure of plant cells. 4. Practice drawing cell structure diagrams. two..

File Info

Update Time: 2024-11-22

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

Preview