Page 7 - Reproduction in Animals

Can you now give some more The tadpoles transform into adults
examples of viviparous and oviparous capable of jumping and swimming. The
animals? transformation of the larva into an adult
through drastic changes is called
Young Ones to Adults metamorphosis. What about the

The new individuals which are born or changes that we observe in our body as
hatched from the eggs continue to grow we grow? Do you think we too undergo
till they become adults. In some metamorphosis? In human beings,
animals, the young ones may look very body parts similar to those present in
different from the adults. The life cycle the adults are present from the time
of frog is shown in Fig. 6.10. of birth.
Observe the different stages of frog
starting from the egg to the adult stage. 6.3 Asexual Reproduction
We find that there are three distinct So far, we have learnt about reproduction
stages, that is, egg → tadpole (larva) →
in some familiar animals. But what
adult. Don’t the tadpoles look so about very small animals like hydra and
different from the adults? Can you microscopic organisms like amoeba? Do
imagine that these tadpoles would some
you know how they reproduce? Let us
day become frogs? find out.

(b) Early tadpole

(a) Eggs

(c) Late tadpole

(d) Adult frog

Fig. 6.10 : Life cycle of frog

72 SCIENCE

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