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1. Vascular bundle is composed of _________.
A. Xylem
B. Phloem
C. Both xylem and phloem
D. Cambium
ANSWER:C.Both xylem and phloem
SOLUTION : The vascular bundle is composed of xylem, phloem, and sometimes a layer of cambium cells. Xylem transports water for the plant, while phloem transports food materials. Cambium cells divide to produce new xylem and phloem as the plant grows.
2. Which kind of transports is present in xylem?
A. No transport
B. Unidirectional
C. Bidirectional
D. Multidirectional
ANSWER:B.Unidirectional
SOLUTION:The unidirectional movement means the movement of molecules in only one direction. Xylem is unidirectional in terms of transportation, meaning the flow of water molecules takes place from the roots towards the top of the plant.
3. Mineral Nutrients are taken up by________.
A. Leaves
B. Stems
C. Branches
D. Roots
ANSWER : D.Roots
SOLUTION:The correct answer is Roots transport minerals from the earth to various sections of the plant
4. Minerals are re- exported by ______.
A. Leaves
B. Stems
C. Branches
D. Roots
ANSWER:A.Leaves
SOLUTION:Minerals are first exported from roots to leaves, and then re-exported from leaves to other parts of the plant.
5. Transpiration is a process related to________.
A. Osmosis
B. Diffusion
C. Active Transport
D. None of the above
ANSWER:B.Diffusion
SOLUTION:So, the correct option is ‘Diffusion’.
6. Plants lose water mainly by the process of ________.
A. Guttation
B. Exudation
C. Transpiration
D. Evaporation
ANSWER:C.Transpiration
SOLUTION: Transpiration is the process through which plants lose water through stomata. Stomata are usually present on the underside of the leaves. It is essentially evaporation of water from the leaves of the plants.
7. Root system in plant develops well when ______.
A. Deficiency of copper
B. Absorption of water increases
C. Deficiency of auxin
D. Deficiency of ABA
ANSWER:B.Absorption of water increases
SOLUTION :
The root system is well developed for absorption of water and minerals.
8. Water entering roots through diffusion is a ___________.
A. Endosmosis
B. Osmosis
C. Passive absorption
D. Active absorption
ANSWER: C.Passive absorption
SOLUTION:Water entering roots through diffusion is part of passive absorption.
9. Transport of food materials in higher plants occurs through______.
A. Flowers
B. Companion cells
C. Tracheids
D. Sieve elements
ANSWER:D.Sieve elements
SOLUTION: Sieve elements- Food made during photosynthesis by the plant leaves are transported to other parts of the plants by a conducting tube called phloem.
10. Transpiration is regulated by the movement of ______.
A. Parenchyma Cells
B. Guard Cells
C. Epithelial Cells
D. None of the above
ANSWER: B.Guard Cells
SOLUTION:
Transpiration is regulated by the movement of the guard cells. The guard cells contain chloroplasts, and so they can manufacture food by photosynthesis.