class- AVES

Question 1

what is their characteristic feature

Answer 1

presence of feathers that enable flying

Question 2

flightless bird example

Answer 2

struthio [ostrich]

Question 3

what are their forelimbs and hindlimbs modified into

Answer 3

forelimbs into feathers and hind modified for walking etc

Question 4

their skin is dry with no glands except

Answer 4

oil glands at the base of tail

Question 5

what is different about their internal structure

Answer 5

they have 2 additional chambers called the crop and gizzard

Question 6

they have solid long bones and cartiliginous endoskeleton

Answer 6

incorrect
they show ossified endoskeleton,
and have hollow long bones with air cavities

Question 7

warm or cold blood

Answer 7

homoiotherms

Question 8

respiration, development, sex, fertilisation

Answer 8

they respire thro lungs, have two air sacs aswell, development is direct, separate sexes, fertilisation is internal

Question 9

examples

Answer 9

corvus [crow], psittacula [parrot].columba [pigeon], struthio [ostrich] , pavo [peacock], aptendytes [penguin] , neophron [vulture]