The first indicator of germination is ________.
A bursting seed coat
Imbibition
A downward-growing radicle
Enzyme activation
Radicle swelling and growth
Imbibition
The first indicator of germination is imbibition.
The first indicator of germination is imbibition.
Imbibition refers to the process of water absorption by a seed. When a seed is exposed to water, it rapidly takes in water through its seed coat. This results in the swelling or rehydration of the seed, which triggers various biochemical and physiological changes inside the seed.
To understand this, one can conduct a simple experiment to observe seed germination. Here's how you can do it:
1. Take some seeds (such as bean or pea seeds) and soak them in water for a few hours or overnight.
2. After soaking, carefully remove the seeds from the water, and place them on a moist paper towel or in a clean, damp cloth.
3. Keep the seeds in a warm and dark place, like a closet or a drawer.
4. Check the seeds regularly over the next few days and observe any changes.
You will notice that the seeds start to swell and take on a softer texture as they absorb water. This is the process of imbibition, and it marks the first indicator of germination. As imbibition occurs, it activates various enzymes and physiological processes inside the seed, leading to the subsequent growth of the radicle (the embryonic root) and other parts of the seedling.
So, the correct answer is B) Imbibition.