The first land plants evolved around 468 million years ago, and reproduced using spores. The earliest seed bearing plants to appear were the gymnosperms, which have no ovaries to contain the seeds. They arose during the l… See more

Angiosperm seeds are "enclosed seeds", produced in a hard or fleshy structure called a fruit that encloses them for protection. Some fruits have layers of both hard and fleshy material. In gymnosperms, no special … See more

Seeds are very diverse, and as such there are many terms are used to describe them.
• Bean-shaped (reniform) – resembling a kidney, with lobed ends on either side of the hilum
• Square or Oblong – angular, with all sides be… See more

A typical seed includes two basic parts:
1. an embryo;
2. a seed coat.
In addition, the endosperm forms a supply of nutrients for the embryo in most monocotyle… See more