Structures and processes related to the evolution and formation of seeds are studied under seed biology. Seed producing plants are also known as spermatophytes. Fundamentally, seeds are means of reproduction. These are further classified into angiosperms and gymnosperms. Angiosperm seeds are produced in a hard protective structure called fruit. Gymnosperm seeds are unenclosed and develop either on the surface of leaves or scales. Seeds occur in various shapes and sizes. They perform several functions such as dispersal to new locations, nourishment to embryo and dormancy during unfavourable conditions. Various factors like weather, insects and diseases can affect the seed production. This book covers in detail some existent theories and innovative concepts revolving around seed biology. From theories to research to practical applications, case studies related to all contemporary topics of relevance to this field have been included herein. This book is a vital tool for all researching or studying seed biology as it gives incredible insights into emerging trends and concepts.