Podcast
Questions and Answers
Which group of mammals lay eggs instead of bearing live young?
Which group of mammals lay eggs instead of bearing live young?
Where are all extant species of monotremes indigenous to?
Where are all extant species of monotremes indigenous to?
What does the name 'monotreme' refer to?
What does the name 'monotreme' refer to?
Which clade contains extinct mammals from the Jurassic and Cretaceous of Madagascar, South America, and Australia?
Which clade contains extinct mammals from the Jurassic and Cretaceous of Madagascar, South America, and Australia?
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How do female monotremes nourish their young?
How do female monotremes nourish their young?
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Study Notes
Monotremes
- Monotremes are the only group of mammals that lay eggs instead of giving birth to live young.
- All extant species of monotremes are indigenous to Australia and New Guinea.
- The term 'monotreme' comes from the Greek words "mono," meaning single, and "trema," meaning hole, referring to the common cloaca through which excretion and reproduction occurs.
Extinct Mammalian Clade
- The clade containing extinct mammals from the Jurassic and Cretaceous periods that were found in Madagascar, South America, and Australia is called “Australodelphia.”
Nourishment of Young
- Female monotremes nourish their young by secreting milk from mammary glands onto their skin, as they lack nipples. The young lap up the milk from the mother's body.
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Description
Test your knowledge about monotremes, a unique group of mammals that lay eggs instead of giving birth to live young. Learn about their distinguishing features and the species that belong to this group.
