Imbibition is the process of adsorption of water by substances without forming a solution. Swelling of seeds when immersed in water is an example of imbibition. Imbibition is the temporary increase in the volume of the cell. Imbibition is a passive transport of materials that does not require energy during the process.

Seeds swell when placed in water due to

There are several processes involved when seeds are placed in water. These processes include osmosis, imbibition, and hydrolysis. Therefore, the correct answer is D) all of these. Let's explore each process in detail.

Osmosis:
Osmosis is the movement of water molecules from an area of lower solute concentration to an area of higher solute concentration through a semipermeable membrane. When seeds are placed in water, the solute concentration inside the seed is higher than the surrounding water. This creates a concentration gradient that drives water molecules to move into the seed through osmosis. As a result, the seed absorbs water, leading to swelling.

Imbibition:
Imbibition is the process in which a solid absorbs a liquid, causing it to increase in volume. When seeds are placed in water, they absorb water through imbibition. The water is absorbed by the dry seed coat, which causes it to swell. Imbibition occurs due to the attractive forces between the water molecules and the molecules in the seed coat. The swelling of the seed coat allows for the activation of enzymes and the initiation of germination.

Hydrolysis:
Hydrolysis is a chemical reaction that involves the breaking of a chemical bond through the addition of water. In the context of seed swelling, hydrolysis plays a role in breaking down complex molecules stored in the seed, such as starches and proteins, into simpler forms that can be used as a source of energy for germination. The hydrolysis of these storage molecules provides the necessary nutrients for the growing seedling.

Summary:
Seeds swell when placed in water due to a combination of osmosis, imbibition, and hydrolysis. Osmosis allows water molecules to move into the seed from an area of lower solute concentration to an area of higher solute concentration. Imbibition occurs as the seed absorbs water, causing it to increase in volume. Hydrolysis plays a role in breaking down complex molecules stored in the seed into simpler forms to provide energy for germination. These processes work together to facilitate the growth and development of the seedling.