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NEET Questions / Botany / Anatomy of Flowering Plants / Monocot Leaf
In a monocot leaf, the bulliform cells are primarily responsible for which of the following adaptations?
Increasing the surface area for photosynthesis
Providing structural support to the leaf blade
Storing water for use during drought conditions
Rolling of the leaf during water stress
The Kranz anatomy, characteristic of C4 plants, is typically ABSENT in monocot leaves. However, some monocot species exhibit a distinct variation of C4 photosynthesis. Which of the following best describes this variation?
A modified Kranz anatomy with smaller bundle sheath cells
Spatial separation of C4 and C3 cycles within different regions of the mesophyll
Single-cell C4 photosynthesis, where both initial carbon fixation and the Calvin cycle occur within the same mesophyll cell
Utilization of PEP carboxylase exclusively in the bundle sheath cells
Which of the following features is NOT directly associated with the parallel venation pattern observed in monocot leaves?
Uniform distribution of vascular bundles throughout the leaf blade
Structural support provided by interconnected veins
Efficient water transport to all parts of the leaf
Enhanced transport of photosynthates via companion cells
The specialized arrangement of mesophyll cells in a typical monocot leaf contributes significantly to its photosynthetic efficiency. How does this arrangement differ from that of a dicot leaf, and what is its primary advantage?
Monocots have tightly packed palisade mesophyll, maximizing light absorption at the upper surface.
Monocots have spongy mesophyll throughout the leaf, enhancing gas exchange.
Monocots typically lack palisade mesophyll, allowing for more uniform light penetration throughout the leaf.
Monocots have a distinct layer of air spaces below the palisade mesophyll, facilitating CO2 diffusion.
Considering the isobilateral nature of most monocot leaves, how does the distribution of stomata differ from that of a typical dorsiventral dicot leaf?
Stomata are absent in monocot leaves.
Stomata are only present on the upper surface in monocots.
Stomata are relatively evenly distributed on both surfaces in monocots, while they are predominantly on the lower surface in dicots.
Stomata are clustered around the vascular bundles in monocots.
In certain monocot species adapted to arid environments, the presence of a thick cuticle and sunken stomata are crucial adaptations. Relate these features to the overall function of the monocot leaf in such environments.
They enhance light absorption for increased photosynthetic rates.
They provide structural support to withstand strong winds.
They minimize water loss while maintaining essential gas exchange for photosynthesis.
They store excess water for use during periods of drought.
Which of the following is NOT a characteristic of a monocot leaf?
Parallel venation
Presence of bulliform cells
Reticulate venation
Intercalary meristem
The function of bulliform cells in monocot leaves is:
Photosynthesis
Transpiration
Rolling and unrolling of leaves
Storage of water
Monocot leaves generally have:
Dorsiventral symmetry
Isobilateral symmetry
Radial symmetry
Asymmetrical
The location of stomata in monocot leaves is typically:
Upper epidermis only
Lower epidermis only
Both upper and lower epidermis
Clustered around the veins
