Exercises classes VIII B

Date: 28.08.2017
                C.W
Exercise
Ans1. Reproduction is important for the continuation of the species.

Ans2. Fertilisation in human beings is Internal fertilisation. It take
place insife the fallopian tube of the female.

Ans5. Zygote is formed after fertilisation. Zygote is a single cell.
      foetus is formed by division of zygote. foetus is made of many cells.

Ans6. Reproduction that involves one parent is called asexual reproduction.
      Two methods are: (1) Binary fission - An organism splits into two.
                        Example - Amoeba
            (2) Budding - A small bud originates from parent
                      and give rise to new.
                    Example: Hydra.
Ans7. uterus
Ans8. The transformation of larva into an adult is called metamorphosis.
      In frogs the 3 stages of metamorphosis are
        Egg----> larva(tadpole)-----> Adult
      In silkworm
    Egg---->Larva(Caterpillar)--->pupa------> Adult
Ans 9. Internal fertilisation - Fertilisation which take place inside the
                female body. Ex Human, cow, hens , etc
    External fertilisation- Fertilisation which take place outside the
                female body. Ex Frog, fish, etc.