Transport in Plants Quiz - CBSE Class 7 Science

Free practice quiz: Transport in Plants (CBSE Class 7 Science). 17 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 7 Science practice quiz has 17 multiple-choice questions on Transport in Plants, and 17 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. What is the primary function of xylem in plants?

   1. Transport of water and minerals
   2. Transport of food
   3. Transport of gases
   4. Transport of hormones
   Show answer

   Answer: A. Transport of water and minerals

   Xylem is a type of tissue in vascular plants that primarily transports water and dissolved minerals from the roots to the rest of the plant.

2. What is the role of phloem in plants?

   1. Transport of water and minerals
   2. Transport of food
   3. Transport of gases
   4. Transport of proteins
   Show answer

   Answer: B. Transport of food

   Phloem is responsible for transporting the food (nutrients and sugars) produced during photosynthesis from the leaves to other parts of the plant.

3. Which theory explains the movement of water through xylem?

   1. Root Pressure Flow
   2. Osmosis Theory
   3. Cohesion-Tension Theory
   4. Transpiration Theory
   Show answer

   Answer: C. Cohesion-Tension Theory

   The Cohesion-Tension Theory states that water moves up the plant through xylem due to cohesive forces between water molecules and tension created by water evaporation at the leaves (transpiration).

4. Which structure in plants prevents excessive water loss during transpiration?

   1. Root hairs
   2. Stomata closure
   3. Xylem vessels
   4. Phloem sap
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   Answer: B. Stomata closure

   When water is scarce, stomata can close to reduce water loss despite incurring a limitation on gas exchange, thus preventing excessive transpiration.

5. Which specialized plant cells facilitate rapid transport of water?

   1. Root hair cells
   2. Vessel elements
   3. Guard cells
   4. Spongy mesophyll cells
   Show answer

   Answer: B. Vessel elements

   Vessel elements are specialized, elongated cells that connect to form continuous tubes in xylem tissue, optimizing the rapid transportation of water and minerals.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Which part of the plant is most responsible for water absorption?
2. How does water move into the root hair cells?
3. Why do plants need to transport materials throughout their structures?
4. What is the direction of water movement in xylem?
5. What is translocation in plants?
6. What happens during the process of transpiration in plants?
7. What is the main driving force for movement of water in xylem tubes during transpiration?
8. How does the concentration gradient affect osmosis in plant roots?
9. What function besides support does lignin in xylem vessels serve?
10. Why is water potential crucial for maintaining water movement in xylem tissue?
11. What unique feature of sieve tube elements supports phloem's function?
12. Which process in plants is heavily influenced by atmospheric conditions such as humidity and temperature?

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