The file includes the features of mammals and the life cycles of various animals along with the video links.

1. Reproduction In Animals
Reproduction
Give birth to
young ones
(MAMMALS)
Lay eggs

2. Features of Mammals
 Reproduce by giving birth to young ones like
themselves.
 Their young ones develop inside their
mother’s body.
 They have hair on their body.
 They feed their young ones with their own
milk.

3. Animals that
lay eggs
Birds Fish Reptiles Insects

4. Internal structure of
an egg
Str of an egg-
https://www.youtube.com/watch?v=y0M4MrseQN0
Reproduction
https://www.youtube.com/watch?v=51PyaF4pctc

5. Fish
• Out of thousands of eggs laid only hundred develop
into small fish.
https://www.youtube.com/watch?v=T3SUvDmIYhw
Frog
Eggs
Tadpole
Young frog
Adult frog
https://www.youtube.com/watch?v=F3ElGMVU6SY&t=136s

6. Reptiles
• Lay eggs on ground which
are protected by a shell which
is leathery.
• They get warmth from sun.

7. Insects
• 3 stages in their life cycle
Nymph, young one looks very
much like an adult.
Nymph sheds its skin several
times before it grows into an adult.
This is called moulting.
Ex: grasshopper, cockroach,
dragonflies
Egg
Nymph
Adult
https://www.youtube.com/watch?v=AvxMnJVCfvo

8. • 4 stages of life cycle
https://www.youtube.com/watch?v=O1S8WzwL
PlM&t=6s
https://www.youtube.com/watch?v=G3VMl-
EY2DM

9. Protection of eggs
• Birds build nest to lay eggs
• Cockroaches hide their eggs in dark corners
• Turtle bury their eggs in the ground
• Crocodiles dig shallow pits
• Butterflies lays eggs on under surface of leaves

10. Young ones need care
• Mammals feed their young ones with their
own milk
• Protect them from enemies
• Teach them to find their own food
• Parent birds provide warmth to the baby bird
by covering them with the wings
• Snakes, frogs and lizards do not take care of
their young ones