Cambridge Encyclopedia » Cambridge Encyclopedia Vol. 67

seed - Seed structure, Seed functions, Economic importance, Oldest viable seeds, Seed packets and seed information

dispersal means produced exposed

The mature, fertilized ovule of a plant, containing the embryo and a food store to sustain the seedling during germination, enclosed within a protective coat, the testa. In gymnosperms the seeds lie exposed on the cone scales; in flowering plants they are protected within the ovary. Some seeds are very large and are produced in small numbers (eg the coconut); others are very small and are produced in prodigious numbers (eg the orchid). Seeds, aided by the fruit, offer a means of dispersal, and in annuals a means of surviving harsh seasons. Some seeds germinate immediately after dispersal, but others remain dormant until exposed to specific conditions, such as low temperatures or high light intensities.

User Comments

Your email address will be altered so spam harvesting bots can't read it easily.
Hide my email completely instead?

Cancel or

Vote down Vote up

over 7 years ago

i need information on functions of ogbono seed

Vote down Vote up

over 7 years ago

You are doing a great job please keep it up