6. Aquatic habitat

Ocean, ponds, lakes, and rivers are examples of aquatic habitats.

Ocean water has salt dissolved in it and is thus a marine habitat. While ponds, lakes, and rivers are freshwater habitat.

 

1. Streamlined body to move easily in water.

 

2. Squids and octopus live deep in the ocean, near the bed of the ocean and catch prey near them. But, when they move in water, the body becomes streamlined.

 

 

3. Gills are used in respiration, where it uses oxygen dissolved in water.

 

4. Whales, Dolphins use nostrils or blowholes present on the upper part of the heads for breathing in air when they reach near the surface of the water. Hence, they can stay in water for a long time without breathing.

 

Plants that live in freshwater habitats develop some special adaptations. Some plants have roots fixed in the soil at the bottom, whereas, some float on water (example water hyacinth), and some are submerged in water.

 

 

1. Roots of the aquatic plants are reduced in size, and the function is to hold the plant in the sea bed.

 

2. Stems are long, hollow, light. Stem grow up to the surface when a flower and leaf float on surface.

 

 

1. All the parts are present underwater

 

2. Some have narrow, thin ribbon-like leaves that bend in water

 

3. The leaves are covered by a waxy layer that protects the leaves from the excess water.

  

 

1. Frog lives in ponds. They can also live on the land.

 

2. Frogs have webbed feet which aid in swimming.

 

3. They have strong back legs which aids in leaping and catching the prey.