MCQ
The function of vessels/ xylem is to:
- ATranslocate water and minerals.
- BTranslocate organic food.
- CTranslocate water alone.
- DTranslocate water, minerals and provide mechanical strength.
Explanation:
Vessel members in xylem are the principal water - conducting cells in angiosperms and are characterized by areas that lack both primary and secondary cell walls, known as perforations. Water flows relatively unimpeded from vessel to vessel through these perforations, though fractures and disruptions from air bubbles are also more likely.
In addition to the tracheary elements, xylem tissue also features fiber cells for support.
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$I.$ Secondary cortex
$II.$ Autumn wood
$III.$ Secondary phloem
$IV.$ Phellem
| Column $- I$ | Column $- II$ |
| $(a)$ Floating Ribs | $(i)$ Located between second and seventh ribs |
| $(b)$ Acromion | $(ii)$ Head of the Humerus |
| $(c)$ Scapula | $(iii)$ Clavicle |
| $(d)$ Glenold cavity | $(iv)$ Do not connect with the sternum |
$(a)\quad(b) \quad(c) \quad(d)$
$R$ : Fibres are absent in secondary phloem.