Here are 20 objective questions on transport in plants with Answers.

1.Which tissue in plants is responsible for the transport of water and minerals?
a) Phloem
b) Epidermis
c) Xylem
d) Parenchyma

2.What is the main driving force for water movement in plants?
a) Active transport
b) Osmosis
c) Transpiration
d) Photosynthesis

3.Water enters the plant through which structure?
a) Stomata
b) Xylem vessels
c) Phloem tubes
d) Root hairs

4.Which process is responsible for the movement of sugars in plants?
a) Osmosis
b) Transpiration
c) Translocation
d) Respiration

5.Which tissue is responsible for the transport of sugars in plants?
a) Xylem
b) Phloem
c) Epidermis
d) Parenchyma

6.What is the primary source of sugars in plants?
a) Roots
b) Stem
c) Leaves
d) Flowers

7.What is the main force driving the movement of sap in the phloem?
a) Transpiration
b) Active transport
c) Cohesion
d) Osmotic pressure

8.Which type of cells are involved in the transport of water in xylem?
a) Sieve tubes
b) Companion cells
c) Tracheids and vessels
d) Collenchyma cells

9.How are mineral ions transported in plants?
a) Through diffusion
b) Active transport
c) Osmosis
d) Transpiration

10.Which part of the plant is responsible for the absorption of water and minerals?
a) Leaves
b) Flowers
c) Stems
d) Roots

11.What is the role of stomata in transport?
a) Absorption of sunlight
b) Exchange of gases
c) Movement of sugars
d) Water storage

12.What is the function of the casparian strip in roots?
a) Regulating water loss
b) Facilitating gas exchange
c) Preventing backflow of water
d) Assisting in nutrient absorption

13.What is the process by which water vapor is lost through leaf stomata?
a) Osmosis
b) Respiration
c) Transpiration
d) Evaporation

14.What is the term used to describe the loss of water from plant leaves?
a) Photosynthesis
b) Osmosis
c) Transpiration
d) Respiration

15.What is the role of transpiration in the ascent of sap?
a) It creates a positive pressure in the xylem.
b) It pulls water up through the xylem.
c) It helps in the transport of sugars.
d) It regulates the opening and closing of stomata.

16.What is the function of phloem sieve tubes in plants?
a) Transporting water and minerals
b) Conducting photosynthesis
c) Transporting sugars and other organic compounds
d) Providing mechanical support

17.Which of the following is not a factor affecting the rate of transpiration?
a) Temperature
b) Humidity
c) Wind speed
d) Root pressure

18.What is the term for the process of loading sugars into the phloem at the source?
a) Translocation
b) Transpiration
c) Transpiration pull
d) Phloem loading

19.What is the primary function of the root hairs in plants?
a) Absorbing water and nutrients
b) Storing carbohydrates
c) Producing hormones
d) Anchoring the plant in the soil

20.What is the movement of sugars from the phloem to the sink tissues called?
a) Transpiration
b) Translocation
c) Photosynthesis
d) Osmosis

Answers:

1. c) Xylem
2. c) Transpiration
3. d) Root hairs
4. c) Translocation
5. b) Phloem
6. c) Leaves
7. d) Osmotic pressure
8. c) Tracheids and vessels
9. b) Active transport
10. d) Roots
11. b) Exchange of gases
12. c) Preventing backflow of water
13. c) Transpiration
14. c) Transpiration
15. b) It pulls water up through the xylem.
16. c) Transporting sugars and other organic compounds
17. d) Root pressure
18. d) Phloem loading
19. a) Absorbing water and nutrients
20. b) Translocation