SCIENCE
E. Fill in the blanks
21. Animals are creation of _______ that co-exist with us.
22. Birds have strong _________ to flap their wings.
23. Reptiles like crocodiles and turtles can leave on _________ and on water.
24. Mammals feed their young with milk produced by their __________ glands.
25. _________ are animals with backbones and they are classified into five smaller groups: fishes, amphibians, reptiles, birds and mammals.