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Biology · ANATOMY OF FLOWERING PLANTS
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Biology · ANATOMY OF FLOWERING PLANTS
Which of the following plant tissue systems forms the outer-most covering of the whole plant body and comprises epidermal cells, stomata, and epidermal appendages?
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Which of the following anatomical features is distinct in monocot roots compared to dicot roots?
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Consider the following statements regarding internal plant anatomy: (A) In dorsiventral leaves, the palisade parenchyma is placed adaxially and consists of elongated cells arranged vertically. (B) In isobilateral leaves, the mesophyll is distinctly differentiated into palisade and spongy parenchyma. (C) Bulliform cells help in minimizing water loss during water stress by making leaves curl inwards. (D) Conjunctive tissue is present between xylem and phloem patches in root vascular bundles. Which of the above statements are correct?
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In dorsiventral (dicotyledonous) leaf, the tissue between upper and lower epidermis is called mesophyll and is differentiated into:
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The inner walls of guard cells towards the stomatal pore are highly thickened. Reason (R): Thickening of guard cell walls assists in maintaining the rigidity required to keep the stomatal pore permanently closed under all conditions. In the light of the above statements, choose the correct answer from the options given below:
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Given below are two statements: Statement I: In a dorsiventral leaf, the abaxial epidermis generally bears more stomata than the adaxial epidermis. Statement II: The stomata are completely absent on the abaxial surface of isobilateral leaves. In the light of the above statements, choose the most appropriate answer from the options given below:
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Given below are two statements: Statement I: Radial arrangement of vascular bundles, where xylem and phloem are arranged in an alternate manner along different radii, is commonly found in roots. Statement II: Conjoint vascular bundles feature xylem and phloem jointly situated along the same radius, which is typical of stems and leaves. In the light of the above statements, choose the most appropriate answer from the options given below:
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Consider the following anatomical features of dicotyledonous roots: (A) The outermost layer is epiblema which bears unicellular root hairs. (B) Cortex consists of several layers of thin-walled parenchyma cells with intercellular spaces. (C) The innermost layer of cortex is endodermis with Casparian strips made of suberin. (D) Vascular bundles are conjoint, collateral and open. How many of the above statements are correct?
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Which region of the dicot root contains water-impermeable waxy material called suberin in the form of casparian strips?
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Consider the following statements regarding the epidermal tissue system and its components: (A) The cuticle is a waxy thick layer covering the epidermis that prevents water loss, and it is entirely absent in roots. (B) Stomatal apparatus consists of stomatal aperture, guard cells, and the surrounding subsidiary cells. (C) In grasses, the guard cells are bean-shaped while in dicots they are dumb-bell shaped. (D) Root hairs are multicellular elongations of epidermal cells that help in mineral absorption. Which of the above statements are correct?
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In grasses, the guard cells of stomata are characterized by which of the following shapes?
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Dicotyledonous roots do not undergo secondary growth. Reason (R): Cambium ring develops between xylem and phloem in dicot roots during secondary growth. In the light of the above statements, choose the correct answer from the options given below:
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In dicotyledonous stem, the cells of the innermost layer of cortex are rich in starch grains and the layer is also referred to as:
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Which of the following tissues constitutes the ground tissue system in primary stems and roots, excluding epidermis and vascular bundles?
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What type of vascular bundles are characteristic of monocotyledonous stem?
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Trichomes help in preventing water loss due to transpiration in shoot systems. Reason (R): Trichomes are epidermal root hair elongations that absorb minerals from the soil. In the light of the above statements, choose the correct answer from the options given below:
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In grasses, certain adaxial epidermal cells along the veins modify themselves into large, empty, colourless cells called:
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Given below are two statements: Statement I: Epidermal cells are parenchymatous with a small amount of cytoplasm lining the cell wall and a large vacuole. Statement II: The cuticle layer on the epidermis is continuous and equally thick across all plant organs including roots. In the light of the above statements, choose the most appropriate answer from the options given below:
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