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Across 3. an oviparous animal 4. fertilization that takes place outside the female body 5. female part for producing ova 7. female part where zygote formation takes place 9. process of reproduction through fertilization 11. male gamete 13. transformation of larva into an adult 15. process of production of own kinds 17. ova produced in one month by ovaries 18. weeks taken by an embryo to develop into a chick 19. larva of a frog

Down 1. fertilized egg 2. after transformation, the caterpillar turns into- 3. fusion of sperm and ovum 6. animals which give birth to young ones 8. animal in which internal fertilization takes place 10. asexually reproducing organism 12. developing structure formed after fertilization 14. fallopian tube 16. layer holding the frog egg together