PHYSIOLOGY
REPRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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internal fertilization and internal development of the fetus
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internal fertilization and external development of the fetus
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external fertilization and external development of the fetus
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external fertilization and internal development of the fetus
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Detailed explanation-1: -In mammals, fertilization takes place internally in the protected environment of the ampulla of the oviduct, as opposed to external fertilization where sperm and egg meet outside the parent’s body (e.g., as in fish, reptiles, amphibians and invertebrates).
Detailed explanation-2: -Internal Fertilization This occurs in most bony fish, many reptiles, some cartilaginous fish, most amphibians, two mammals, and all birds.
Detailed explanation-3: -This occurs in most mammals, some cartilaginous fish, and a few reptiles, making these animals viviparous. Internal fertilization has the advantage of protecting the fertilized egg from dehydration on land. The embryo is isolated within the female, which limits predation on the young.