What are the experimental operations for the high school entrance examination biology exam?

There are ***5 experimental operations for the high school entrance examination biology exam, which are:

1. Use of optical microscopes

Experimental requirements: Use the optical microscope correctly.

Materials and utensils: 1 ordinary optical microscope, 1 glass slide with the word "上" written on it, 1 lens cleaning paper, and 1 ball of gauze.

2. Make and observe the temporary mounting of onion scale leaf epidermal cells

Experiment requirements:

1. Skillfully make the temporary mounting of onion scale leaf epidermal cells.

2. Observe the film installation.

Experimental equipment: onion scale leaves, 1 plastic-tipped dropper, clean water, iodine solution (replace with iodine wine), 1 microscope, slides, cover slips, razor blades, tweezers, and dissecting needles 1 each, 1 ball of clean gauze, 1 box of absorbent paper.

3. Use a microscope to observe tomato pulp cells

Experiment requirements:

1. Skillfully make temporary mounting slices of tomato pulp cells.

2. Observe with a microscope.

Materials and tools: 1 slide, cover slip, tweezers, pipette, dissecting needle, plastic dropper, 1 gauze, 1 microscope, a box of water, tomatoes, absorbent paper, wipe A box of mirror paper.

4. Observe the structure of seeds

Experimental requirements:

1. Observe soybean and corn seeds and identify the basic structure of seeds.

2. Handle and dissect seeds skillfully, and observe the structure of seeds according to correct procedures.

Materials and tools: Soaked soybean and corn seeds, 1 scalpel, magnifying glass, tweezers, 1 white porcelain plate, 1 dissecting needle each, 1 bottle of iodine

liquid.

5. Making temporary slices of leaves

Experiment requirements:

1. Be proficient in making freehand slices.

2. Observe the slices.

Materials and utensils: Leaves of fresh plants (spinach, rape, etc.) (enough), double-sided blades (2 pieces per set; put the two pieces together, tape one side firmly with tape, and place half of the blade in the middle. Glue both ends firmly, 1 pair of tweezers, 1 Petri dish filled with clean water, 1 dropper, gauze, 1 slide, 1 box of cover slips, 1 microscope, and absorbent paper (enough).