Write one important function of the following :

1. Fins
2. Gills
3. Swim bladder of a fish
4. Hump of a camel
5. Streamlined body of a bird

Choose the odd one and give reason in support of your answer :

1. Neem, Pine, Fir, Cedar
2. Reindeer, Deer, Polar bears, Penguins
3. Scales, Fins, Fur, Gills
4. Seeds of — Cotton, Poppy, Drumstick, Mango
5. Water lily, Lotus, Cactus, Vallisneria

Describe the aerial adaptations in birds.

Differentiate between an aquatic habitat and a terrestrial habitat.