Page 241 - Demo

HOW ANIMALS REPRODUCELet us learn all about it.Animals reproduce in two different ways. Some animals like birds, frogs, fish, and snakes lay eggs. In all these animals, the young one develops inside the egg. The egg hatches and the young one comes out.a cow with its calfa bird%u2019s nest with eggs a mother bird with baby birdsThe largest egg in the world is laid by the ostrich and can weigh up to 3 pounds!Did you know?eggs a chickSome animals like cows, dogs, cats, rabbits, rats and elephants give birth to young ones. In all these animals, the baby develops inside the mother%u2019s body.ANIMALS THAT LAY EGGS Birds reproduce by laying eggs. They make nests on trees to lay eggs.internal structure of an eggegg shellyolkalbumenTHE STRUCTURE OF AN EGGLet us now examine the inside of a bird%u2019s egg. There is a hard shell called the egg shell that protects the growing baby bird, called the embryo. Within the egg shell is the white of the egg, called the albumen. The yellow yolkhas food for the embryo.But how does a baby bird come out of the egg?The eggshell of a bird%u2019s egg is made almost entirely of calcium carbonate, a type of mineral!Did you know?240 Arrow-Puffin-4_Semester-1 Science