1. C14
2. I121
3. P32
4. All of these
C14
1. 3H
2. 14C
3. 121I
4. 32P
14C
1. Proterozoic era
2. Mesozoic era
3. Azoic era
4. Coenozoic era
5. Palaeozoic era
Azoic era
1. Wings of kiwi
2. Coccyx in man
3. Pelvic girdle of python
4. Flipper of seal
5. None of the above
Flipper of seal
1. Differential
2. Vestigal
3. Analogous
4. Homologous
5. None of these
Homologous
1. Bat-Rat
2. Whale-Seal
3. Duck-billed platypus-pangolin
4. Scaly ant eater-Spiny ant eater
Whale-Seal
1. Pliocene
2. Holocene
3. Miocene
4. Oligocene
Holocene
1. Saprozoic
2. Autotrophic
3. Holozoic
4. Saprophytic
5. Parasitis
Holozoic
1. Respiration
2. Excretion
3. Locomotion
4. Osmoregulation
Osmoregulation
1. Physiology
2. Morphology
3. Biogeography
4. Embryology
Morphology