Page 242 - Demo

life cycle of a frogeggtadpolefrogchickheneggWithin the egg, the embryo goes through various stages of development. The embryo develops only when it is kept warm. The mother bird sits on the egg and provides warmth to it. In a few days, the egg hatches and the baby bird comes out of it.a snake with its eggs a lizard with its eggs a turtle with its eggsWhat is the purpose of the egg yolk?CheckpointThere are other animals that also reproduce by laying eggs.A frog lays its eggs in water. A tadpolecomes out of each egg. It lives in water. A tadpole looks more like a fish than a frog. It swims in water. It undergoes several changes before it becomes an adult frog.A fish lays thousands of eggs in water. The baby fish come out of the eggs after some time.A whale lives in water but it is not a fish. It does not lay eggs but gives birth to its young ones.Did you know?Other animals like snakes, lizards and turtles lay eggs in holes in the ground. The eggs get warmth from the sun and hatch into babies.Why do mother birds sit on their eggs?CheckpointArrow-Puffin-4_Semester-1 Science 241