Sexual reproduction is a mode of multiplication in which the young ones are produced through the process of formation & fusion of gametes. Significance of sexual reproduction : Variation :
Due to reshuffling of chromosomes and crossing over, sexual reproduction brings about variations in almost all characters so that no two individuals are similar. Vigour and Vitality :
It maintains the vigour and vitality of the individuals. Uniformity of Population :
Due to the flow of genes amongst individuals during sexual reproduction, the uniformity of population is maintained where there is a broad resemblance of all the individuals with one another. Evolution :
Genetic changes brought about by sexual reproduction paly an important part in evolution of new forms. Sexual reproduction in flowering plants :
A flower has following parts. Sepals :
Sepals are green outermost leaf-like floral organs which protect the flower in the bud stage. In the mature stage they provide support to other floral organs.