The length of pollen tube depends on the distance between :

Characters that are transmitted from parents to offspring during sexual reproduction show:

The number of chromosomes in parents and off springs of a particular species remains constant due to :

Which of the following statements are true for flowers ?

(i) flowers are always bisexual

(ii) they contain sexual reproductive organs

(iii) they are produced in all groups of plants

(iv) after fertilisation they give rise to fruits

The correct sequence of organs in the male reproductive system for the transport of sperms is: