Question

1) How does a hydra reproduce? Explain with the help of a diagram







2) Explain the structure of a sperm ? Explain with the help of a diagram





3) Explain the term fertilisation
gestlation
implantation





4) why is it important. a very large number of sperm should be present in semen

Answer 1

1.two ways by which Hydra reproduce r budding and regeneration . in budding a bulb like structure comes out of the parent cell when this is grown and fully mature it detaches itself from the parent body and grows into a young hydra.
2.it is motile germ cell -it contain food for the female gamete.
3.when a male gamete fuse with female gamete to form a egg or zygote.
the time period from the fertility up to the birth is gestation.