I. Experimental Objectives

1. To observe the order of growth of the various parts of the structure and the characteristics of each structure when the plant seed germinates;

2. To study the conditions of plant seed germination whether light is required.

II. Experimental materials:

10 mung bean seeds in good growing condition, two transparent plastic cups (homemade), skimmed cotton, water III. Experimental process

1, make a culture cup: lay the skimmed cotton flat in the plastic cup.

2, 10 mung bean seeds in a cup with water soaked overnight, each take 5 in two transparent plastic cups method is to use tweezers to put the seeds between the cotton wool and the wall of the bottle, and then carefully add water to the cup to the surface of the water away from the bottom of the cup 2cm high, will be placed in the temperature of one incubator cup (about 25 degrees Celsius) in the light place (such as the windowsill), the other is placed in the dark place with the same temperature.

3. Observe seed germination at regular intervals (9 am) every day and take photos to record seed germination, along with a written description. When describing, pay attention to describing the names of the structures that grow out of the plant (radicle, cotyledon, true leaf, embryonic axis); describe the color of the leaves and the color of the embryonic axis; measure and record the changes in the height of the seedlings.

IV. Conclusion of the experiment:

1. I found that seeds grow radicle before cotyledons when they germinate.

2. The shape of the cotyledons is rounded and flat and the true leaves are lanceolate.

3. The germ of mung beans germinating in the dark is reticulate.

4. I don't think plant seeds need light to germinate.

5. Problems Found

I also found the following problems during the experiment:

If the seed that grows a germinal root is put in a place without water, it will grow slowly.

If you touch the young embryo with your hand, it stops growing.