5. Which plants grow completely under water?
a) Duckweed
b) Hydrilla
c) Lotus
d) Water lettuce
6. The exchange of gases in water lilies takes place through:
a) Roots
b) Lower leaf surface
c) Upper leaf surface
d) Stem only
7. What type of soil do salt bush plants grow in?
a) Sandy soil
b) Fertile soil
c) Saline soil
d) Acidic soil
8. Plants growing in very cold places are called:
a) Desert plants
b) Aquatic plants
c) Mountain plants
d) Salty plants
9. Pondweeds and tape grasses are examples of:
a) Floating plants
b) Fixed plants
c) Underwater plants
d) Desert plants
10. Adaptation helps plants to:
a) Change colour
b) Move from place to place
c) Survive in their surroundings
d) Grow fruits
D. Short Answer Questions
1. What are terrestrial plants? Give two examples.
2. Why do mountain plants have needle-like leaves?
3. Write any two features of floating plants.
4. How do underwater plants breathe?
5. What are adaptations? Why are they important for plants?
E. Long Answer Question
Explain the three types of aquatic plants with examples.
