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A transverse section of a plant material...

A transverse section of a plant material shown the following anatomical features under a microscope :
Thick cuticle , stomata discontinuous sclerenchymatous hypodermis , Armed parenchyma , 'T' shaped sclerenchymatous girdle , Two - conjoint , collateral and open vascular bundle .
the plant material must be a

A

Cycas rachis

B

Cycas leaflet

C

Pinus needle

D

Nerium leaf

Text Solution

AI Generated Solution

The correct Answer is:
To determine the plant material based on the anatomical features provided, we can analyze each characteristic step by step. ### Step-by-Step Solution: 1. **Identify the Features**: The anatomical features provided are: - Thick cuticle - Discontinuous stomata - Sclerenchymatous hypodermis - Armed parenchyma - 'T' shaped sclerenchymatous girdle - Two conjoint, collateral, and open vascular bundles 2. **Understanding the Features**: - **Thick Cuticle**: This is often found in plants that need to minimize water loss, typical of xerophytic plants. - **Discontinuous Stomata**: This suggests adaptations to conserve water, which is common in plants from dry environments. - **Sclerenchymatous Hypodermis**: This provides structural support and is often found in plants that require extra protection. - **Armed Parenchyma**: This may refer to cells that have some form of defense mechanism, possibly spines or thorns. - **'T' Shaped Sclerenchymatous Girdle**: This structure is indicative of certain gymnosperms. - **Two Conjoint, Collateral, and Open Vascular Bundles**: This is a specific arrangement of vascular tissue that can help identify the type of plant. 3. **Identify the Plant Group**: The presence of these features indicates that the plant is likely a gymnosperm, particularly a conifer. 4. **Evaluate the Options**: - **Cycus Rachis**: This is part of a cycad, which has different leaf structures and does not match all the features. - **Cycus Leaflet**: Similar to the rachis, this does not match the described features. - **Pinus Needle**: This matches the characteristics described, particularly the thick cuticle, discontinuous stomata, and the vascular bundle arrangement. - **Miriam Leaf**: This is not a gymnosperm and does not match the features. 5. **Conclusion**: Based on the analysis, the plant material must be a **Pinus Needle**. ### Final Answer: The plant material must be a **Pinus Needle**.
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