AP BIOLOGY

Detailed explanation-1: -Water plays an important role in seed germination. It helps by providing necessary hydration for the vital activities of protoplasm, provides dissolved oxygen for the growing embryo, softens the seed coats and increases the seed permeability.

Detailed explanation-2: -The most important factors are water availability, temperature and sunlight. Water is crucial to seed germination. The seed must go through imbibition to activate root growth.

Detailed explanation-3: -When you introduce a seed to water under the right conditions, the seed soaks up that water, swells, and breaks its outer shell. This process of water absorption and swelling is called “imbibition”. Once the shell bursts, the germinated seed – a burgeoning sprout – emerges from its shell and begins to grow.

Detailed explanation-4: -Water, air and suitable temperature are necessary for seed germination. Water is necesssary for germination because food is stored in the seeds in dry condition, but the developing embryo cannot utilize this dry food. Food can be utilized in liquid form only and seeds can utilize only dissolved oxygen.