Aquatic life and the balance in nature

Water birds like ______________ live in water

• Sparrows

• Pigeons

• Geese

• None of these

Fishes have which of the following features

• Streamlined bodies

• Fins

• Gills

• None of these

• All of these

Organisms that have a backbone/ spinal cord are called

• Vertbrates

• Vertebraes

• Vertebrates

• Aquatic animals

Submerged plants have which of the following features

• Light and hollow stems

• Thin and narrow leaves

• Both a and b

• None of these

What are the three types of plants

• Submerged plants

• Fixed plants

• Floating plants

• All of these

Examples of submerged plants are

• Ferns

• Vallisneria

• Both a and b

• None of these

Examples of fixed plants are

• Water hyacinth

• Lotus

• Both a and b

• None of these

Examples of floating plants are

• Pondweed

• Water pennyworth

• Both a and b

• None of these

The __________ mosquito carries a parasite that is responsible for Malaria

• Male Anopheles

• Female Anopheles

• Aedes Aegypti

• None of these

We can prevent the spread of mosquito borne diseases by

• Throw away new pots and cans and use mosquito nets and repellents

• Put wire screens on window and never change water in air coolers

• Both a and b

• None of these