Fill in the blanks.
i. Fish breathe with …………. instead of a nose.
ii. Fish have …………. within the body to help them to float.
iii. Frog and duck have …………. toes.
iv. Tigers have …………. paws.
v. Bats can fly with the help of …………. .
vi. Desert plants are either leafless or their leaves are like …………. or modified into …………. .
vii. Spring like …………. on the stems of some climbers are examples of their adaptation.
viii. …………. is not a sudden process, it is gradual and continuous.
ix. …………. proposed the theory of the survival of the fittest.
