EVS Revision Ch-6 Natural Fliers
FILL IN THE BLANKS: - 1 Ostrich and Emus are flightless birds. 2 The shaft of a feather is made up of a very hard material called keratin 3 Pointed wings indicate a fast flier . 4 Feathers are held together in place by a hollow tube called Shaft or Rachis 5 The three types of feathers are- Body feathers down feathers flight feathers 6. Shor t and broad winged birds can fly low. ANSWER THE FOLLOWING QUESTIONS :- 1. What is keratin ? Ans. Feathers are held together in place by a hollow tube ca...