2) Most mammals give birth to live young.
(a) Some animals such as dogs, cats and rats give birth to many offspring.
(b) Some animals, for example, the cow, elephant, rhinoceros and whale give birth to only one
young at a time. The calves of cows and elephants grow in the wombs of their mothers until
they are born.
(c) The animal babies feed on milk from their mothers' mammary glands.
(d) Mammals take care of their young until the young are mature and able to take care of
themselves.
(e) The only mammals that lay eggs are the duck-billed platypus and the spiny anteater.
3) Amphibians, birds, reptiles, fish and insects reproduce by laying eggs.
(a) Some animals lay many eggs while some lay only a few eggs at a time.
(b) Frogs lay thousands of eggs on the surface of water. Tadpoles hatch from these eggs.
(c) Hens. ducks and birds lay a few eggs at a time. Chicks hatch from the eggs of a hen.
(d) Some animals do not take care of their eggs or young. Other animals only take care of their
eggs but do not take care of their young.
4) Animals can be classified according to the way they reproduce.
ANIMALS THAT GIVE BIRTH
Rabbits, hamsters, squirrels, goats, orang-utans, giraffes, lions, elephants, pandas, bears, seals, kangaroos.
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| A leopard and its cubs |
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| A Whale and its calf |
ANIMALS THAT LAY EGGS
Snakes, crocodiles, lizards, tortoises, snails, bees, butterflies, cockroaches, grasshoppers, penguins, sea horses.
A turtles and its eggs.
A platypus.
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