Question

Describe eggs and egg laying in monotremes.

Answer 1

Hmm.. @ElizabethS
Female monotremes lack a uterus and vagina. Instead, they have a cloaca with one opening, like the cloacas of reptiles and birds. The opening is used to excrete wastes as well as lay eggs.

Monotreme eggs have a leathery shell, like the eggs of reptiles. The eggs are retained inside the mother’s body for at least a couple of weeks. During that time, the mother provides the eggs with nutrients. Platypus females lay their eggs in a burrow. Echidna females have a pouch in which they store their eggs. Female monotremes have mammary glands but lack nipples. Instead, they “sweat” milk from a patch on their belly.

Answer 2

Summary

Monotremes reproduce by laying eggs.
Monotremes have a cloaca instead of a uterus and vagina. The eggs pass through the opening of the cloaca.

Answer 3

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