Which of the following is the unique characteristic of birds (class aves)?
a) scales
b) feathers
c) four chambered heart
d) lungs
Which of the following characteristic/s of birds is/are reptilian characteristic/s?
a) scales on legs
b) claws
c) lungs
d) both a and b
Archaeopteryx, the lizard tailed bird is of size of ……..was found from rocks of Jurassic period.
a) hen
b) crow
c) sparrow
d) ostrich
Explanation: it has characters of both reptiles and birds so can be considered a transition species between the two groups
Which of the following characteristic/s of birds was/were found in archaeopteryx?
a) well developed contour and flight feathers
b) forelimbs modified to wings, jaws elongated to form beak
c) tails with two row of feathers, large skull with single occipital condyle
d) all of these
Which of the following reptilian character/s was/were found in archaeopteryx?
a) presence of scales on legs, bones solid, jaws with teeth
b) tail with 20 caudal vertebrae, 9 to 10- cervical vertebrae, no fusion of trunk
c) sternum not keeled, fore limbs with three clawed fingers
d) all of these
Which of the following was a connecting link between reptiles and birds?
a) crocodile
b) crow
c) archaeopteryx
d) ostrich
