81.
Aerenchyma provides
A
Flexibility to plants
B
Mechanical strength to plants
C
Buoyancy to hydrophytes plants
D
Promoting nature of photosynthesis
Answer :
Buoyancy to hydrophytes plants
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
82.
Which of the following statements is true?
A
Vessels are multicellular with narrow lumen
B
Tracheids are multicellular with narrow lumen
C
Vessels are unicellular with wide lumen
D
Tracheids are unicellular with wide lumen
Answer :
Tracheids are unicellular with wide lumen
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
83.
In the following how the sap wood is converted into heartwood
A
By degeneration of protoplast of living cells
B
Tyloses formation
C
By deposition of resins, oil gum etc.
D
All of the above
Answer :
All of the above
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
84.
Vascular bundle in which phloem is surrounded by xylem is called
A
Amphicribral
B
Conjoint collateral
C
Amphivasal
D
Radial
Answer :
Amphivasal
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
85.
Sap wood is
A
Inner part of secondary phloem
B
Outer part of secondary phloem
C
A and B both
D
None of the above
Answer :
None of the above
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
86.
Bulliform cells that help in the folding down of lamina in drought are present in epidermis of
A
Monocotyledonous grass leaf
B
Dicotyledonous leaf
C
A and B both
D
None of the above
Answer :
Monocotyledonous grass leaf
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
87.
The cell functionally associated with sieve tube is
A
Phloem fibres
B
Phloe Parenchyma
C
Companion cell
D
Collenchyma
Answer :
Companion cell
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
88.
Vessels and companion cells are characteristics of
A
Angiosperm
B
Gymnosperm
C
Pteridophyta
D
Fern
Answer :
Angiosperm
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
89.
Bulliform cells are
A
Water filled and highly vacuolated epidermal cell
B
Prokaryotic cell
C
Eukaryotic cell
D
Ball like parenchymatous cells
Answer :
Water filled and highly vacuolated epidermal cell
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
90.
Mesophyll is differentiated into palisade and spongy tissue in
A
Extremely xerophytic leaves
B
Hydrophytic leaves
C
Monocot leaves
D
Dicot leaves
Answer :
Dicot leaves
Discuss Question
No explanation is given for this question. Let's discuss the answer together.