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Science CBSE Homework Assignments
Class 10
Life Process
Transportation
2.
Xylem and phloem
Question:
6
m.
Choose the best answer:
1
.
Identify the following components of the phloem that has thin walls attach to the lateral wall of
Phloem fibre
Sieve tubes
Companion cells
Phloem parenchyma
Sieve elements
2
.
On which of these mechanisms is the ascent of sap based on.
Cohesive and adhesive forces
All of these
Continuous water column
Transpiration pull
3
.
The conditions necessary for imbibition are
Affinity betwwen imbibant and imbibate
All of the above
Presence of concentration gradient
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