To examine specimens of germinating bean seeds.
Answers
Explanation:
Germination :
Germination is the development of a plant from a seed or spore under specific environmental conditions. In other words, Seed germination is a process in which dormant embryo of seed resumes metabolic activities and grows to produce a seedling.
The most common example of germination is the sprouting of a seedling from a seed of an angiosperm or gymnosperm.
There are 2 types of Germination, namely:
Epigeal Germination.
Hypogeal Germination.
Epigeal Germination:
In epigeal germination (or epigeous germination), the hypocotyl elongates and forms a hook, pulling rather than pushing the cotyledons and apical meristem through the soil. Once it reaches the surface, it straightens and pulls the cotyledons and shoot tip of the growing seedlings into the air.
Example: Kidney Beans, tamarind, and papaya are examples of plants that germinate this way.
Hypogeal Germination:
In hypogeal germination, the epicotyl elongates and forms the hook. In this type of germination, the cotyledons stay underground where they eventually decompose.
Example: Maize, peas, mango. Here the cotyledon remains below the soil. They dry up and become shrivelled when the food reserves are exhausted. The epicotyl elongates and pushes the plumule above the ground.
In both types of germination 3 processes are common:
The seed soaks up water and the seed coat may burst.
The radicle elongates and forms the primary root. Root hairs make their appearance.
The plumule emerges after the radicle. Leaves appear before the food reserves get exhausted so that the small plant can start preparing food by photosynthesis.
The Three Bean Seed Experiment:
This experiment shows that Oxygen and water are necessary for seeds to germinate.
Explanation:
There are two easy tests you can take to check to see if there is life left in your old seeds. Water test: Take your seeds and put them in a container of water. Let them sit for about 15 minutes. Then if the seeds sink, they are still viable; if they float, they most likely will not sprout