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11)A mode of reproduction in which a organism has abilities to reproduction with its vegetative parts.It requires only one parents to reproduction in asexsual reproduction.
12) (b)Animals that give birth to young ones are called vivaporous animals.Examples-Humans,cows.
Animals that lays eggs and then young ones hatches from eggs then they are called ovaporous animals.Examples-Frogs,Hens
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Explanation:
Answer 11: Asexual reproduction is the phenomenon by which certain organisms can make more of themselves without the need of a partner.
For Eg: Mitosis (Binary fission) in an amoeba, Fragmentation in segmented worms.
Answer 12 (a) : Their are multiple stages in firtilisation in human biengs. Once the sperm have made it past the cervix and into the either one of the fallopian tubes, the sperm fuses with the egg. The result of this union is the conversion of the egg into a zygote.
Answer 12 (b) : Oviparous animals are creatures that lay eggs, on the other hand, viviparous animals have their young ones develop in a womb and do not lay eggs.
Examples for oviparous animals: Most birds, turtles, Crocodiles etc.
Examples for viviparous animals: Most Mammals including humans.
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