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In prototherians, mammary glands are
In prototherians, mammary glands are
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The correct option is D Present in male and female both
Members of the subclass Prototheria lay eggs like most non-mammalian vertebrates. However, they feed their newborn with mammary gland secretions like all other mammals. They lack nipples, but the skin over their mammary glands exude milk for their babies. The Prototheria are also referred to as monotremes, which literally means that they have one opening for excretion and reproduction. This is similar to birds and reptiles. The mammary glands of prototheria are modified sweat glands. Males in addition to females possess functional mammary glands.
Members of the subclass Prototheria lay eggs like most non-mammalian vertebrates. However, they feed their newborn with mammary gland secretions like all other mammals. They lack nipples, but the skin over their mammary glands exude milk for their babies. The Prototheria are also referred to as monotremes, which literally means that they have one opening for excretion and reproduction. This is similar to birds and reptiles. The mammary glands of prototheria are modified sweat glands. Males in addition to females possess functional mammary glands.
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