1. Mention FIVE adaptations of aquatic organisms to their habitat. B. Write out the causative organisms fro the following infections (1) cholera (ii) malaria (iii) yellow fever C. Highlight THREE characteristics of mammals.​

Aquatic animals have various structural modifications in their body to adapt to the aquatic habitats. Some of the adaptations of aquatic animals are:

Their body is streamlined and hence, they can swim easily.

They have gills as the respiratory organs.

They have fins as the locomotory organs, Various types of fins are present in fishes such as dorsal fins, pectoral fins, caudal fins etc.

The body is covered by appendages known as scales. They are meant for protection.

Some fishes have modified swim bladder with the help of which they can constantly float at a certain depth of water.

B. Cholera and Yellow Fever

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