science - reproduction in animals

Class 8 - Science

Reproduction in Animals

Q&A
Notes

Young Ones to Adults


The new individuals which are born or hatched from the eggs continue to grow till they become adults. In some animals, the young ones may look very different from the adults. Recall the life cycle of the silkworm (egg larva or caterpillar pupa adult) you studied in Class VII. Frog is another such example. Observe the different stages of frog starting from the egg to the adult stage.We find that there are three distinct stages, that is. egg > tadpole (larva) > adult. Don't the tadpoles look so different from the adults? Can you imagine that these tadpoles would some day become frogs? Similarly, the caterpillar or the pupa of silkworm looks very different from the adult moth. The features that are present In the adult are not found In these young ones. Then what happens to the tadpoles or caterpillars thereafter? You must have seen a beautiful moth emerging out of the cocoon. In the case of tadpoles, they transform into adults capable of jumping and swimming. The transformation of the larva into an adult through drastic changes is called metamorphosis. What about the changes that we observe in our body as we grow? Do you think we too undergo metamorphosis? In human beings, body parts similar to those present in the adults are present from the time of the birth.

--- >>>

Notes


Reproduction in Animals - Notes
1. Fertilization
Show Notes
2. Female Reproductive Organs
Show Notes
3. Male Reproductive Organs
Show Notes
4. Asexual Reproduction
Show Notes
5. Sexual Reproduction
Show Notes
6. Viviparous and Oviparous Animals
Show Notes
7. Young Ones to Adults
Show Notes
General Knowledge Quiz
3001 Bizarre Facts
Dictionary
Elementary English Grammar Test
Standard English Grammar Test
Advanced English Grammar Test
Daily English Quiz
English Test
Grammar Examination
ESL / EFL Test
Grammar Test
Antonyms
Synonyms
Homonyms
Vocabulary Examination
Word Analogy
Vocabulary Flashcards
Idioms
Idioms Quiz
Quantitative Aptitude Test
iQ Quiz Game
Verbal Reasoning Quiz - Mind Game
English Question Answer
Vocabulary Game 1
Vocabulary Game 2
Scramble Word Game
Common Mistakes
Confusing Words
Basic English Usage
English Grammar
Prepositions
English Phrases
Learn English
Word Game
Interview Questions and Answers
Educational Quiz Games