Sc 4 ch4 long short

science chapter 4 class 4 Short answer type question Ans1- the animals which reproduce by giving birth to young ones of their own kind are called mammals. example cow, dog, horse, lion etc Ans2- stage in the life cycle of a frog: eggs ,tadpole,littile frog and adult. Ans3- some ainimal lays egg in large number because of out of thousands of egg, only a few of them develop into to tiny baby. Ans4- the eggs of animals have a white thick liquid part of albumen and yellow part yolk in the centre. Long answer type question: Ans1- the process by which an animal or plant is able to produce another animal or plant of its own kind is called reproduction. Some animals give birth to young ones and some animals usually reproduce by laying eggs, thus reproduction differs in the different animals. Ans2- some animal like hen bird,fishes usually reproduce by laying eggs and the embryo or young one before birth develops inside the egg. whereas Dogs, cows give birth to young ones and the young one of these animals develop inside their mother's body. Ans3- The animals that lay eggs is known as egg-laying animal or oviparous animal. The embryo or young one before birth develops inside the egg, most egg laying animals ensure that the eggs are kept safe and want to allow the embryo inside to develop fully by the time it hatches out of the egg. Ans4- some insects like cockroach and grasshopper pass through three stages in their life cycle :egg nymph and adult. while insects like housefly and butterfly pass through four stages in their life cycle: egg larva Pupa and adults ... the larva feeds and grow rapidly and turns in stage called Pupa,finally the Pupa changes into adult.