AIIMS 2018 Botany Xylem and Phloem MCQ Question
The given figures are types of elements (A and B) which constitute one type of complex tissue (C) of a plant. Identify A, B and C.
A–Tracheid, B–Vessel, C–Xylem
A–Vessel, B–Tracheid, C–Phloem
A–Fibre, B–Tracheid, C–Bark
A–Fibre, B–Sclereid, C–Casparian strips
Correct Answer
Detailed Explanation
Option A is correct because tracheids and vessels are the two main types of elements that make up xylem, which is responsible for the conduction of water (H₂O) and minerals from the roots to the rest of the plant. Option B is incorrect as phloem primarily consists of sieve tubes and companion cells, not xylem elements. Option C misidentifies bark, which includes protective tissues rather than the conductive tissues of xylem. Option D incorrectly pairs fibres and sclereids with Casparian strips, which are found in the endodermis of roots, not in complex tissues like xylem.
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