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Question : Define external fertilisation. Mention its disadvantages. |
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Answer» Solution :In most aquatic organisms such as lagae, fish and AMPHIBIANS, syngamy occurs outside the body of an ORGANISM in the external medium (water). This type of gametic FUSION is called external fertilisation. Disadvantage : MANY of the offspring are not protected from predators. Their survival is threatedned up to adulthood. |
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