An egg is the organic vessel containing the zygote in which an animal embryo
develops until it .... Among mammals, early extinct species laid eggs, as do
platypuses and echidnas (spiny anteaters). P...
These birds spend a lot of time caring for their young to help the species stay
alive. In contrast, birds who lay 10 or more eggs, including the Mandarin duck,
Monotremes, mammals that lay eggs, are limited to the platypus and several
species of spiny anteaters. These animals form an umbilical cord to the egg
Most species of fish, amphibians, all birds, reptiles and most insects and
arachnids lay eggs. In most reptiles and birds, fertilisation of the ovum is what
animals lay eggs? Have the children ever seen their eggs? Tell them we use
commas to separate items in a list. Ask the children to describe what is
At least we know that mammals don't lay eggs right? Well actually, that's not
entirely true. There are two primitive species of mammal that do lay eggs.
It's one of two types of primitive egg-laying mammals, or monotremes. .... we have
since been in the forefront of captive research and breeding of this species.
There are only five living monotreme species: the duck-billed platypus and four ...
are very primitive for mammals because, like reptiles and birds, they lay eggs ...
Why Some Bird Species Lay Only One Egg. Date: December 9, 2008; Source:
University of California - San Diego; Summary: A global study of the wide
Jul 30, 2013 ... Boa constrictors are one species which gives birth to live young rather than
laying an egg and being a snake their ears are 'inside their body'.