Question:
The grittiness of the pulp of wood apple is due to
The grittiness of the pulp of wood apple is due to
Updated On: Jun 21, 2022
- macrosclereids
- brachysclereids
- osteosclereids
- astrosclereids.
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The Correct Option is B
Solution and Explanation
Sclereids. may occur singly or in groups. They provide stiffness to the part in which they occur. The important types of sclereids are stone cells or brachysclereids, macrosclereids, osteosclereids, astrosclereids, filiform selereids and trichosclereids. Brachysclereids are unbranched, short and isodiametric with rarniform (branched) pits and are responsible for grittiness of guava) sapota, apple and pea. Macrosclereids are present in seed coat of pulses (legume). They are slightly elongated and columnar or rod shaped cells and form palisade like layer in seed coat.
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Concepts Used:
Anatomy of Dicotyledonous and Monocotyledonous Plants
Dicot Root:
- Dicot plants have the taproot system.
- The outermost layer is called the epidermis. The epidermal cells sometimes project out which appear as the root hairs.
- The epidermis is followed by the multi-layered cortex, loosely made of the parenchyma cells with intercellular spaces.
- The inner layer of the cortex is called endodermis, which is tightly packed by the barrel shaped-cells.
- Endodermis is followed by pericycle, which are a few layers of thick-walled parenchyma cells.
- In dicots, the central pith is not distinct.
- There are two to four xylem and phloem.
- The xylem and phloem are remarked by a layer of parenchymatous cells known as conjunctive tissue.
Monocot Root:
Monocot roots do not show much difference in the anatomy from that of the dicot roots.
- Monocot plants possess an adventitious root system.
- As in the dicots, the epidermis forms the outermost layer, followed by cortex, pericycle, endodermis, vascular bundles (xylem and phloem) and pith (random order).
- Pith is conspicuous and large.
- The number of xylem in a monocot is six or more.
- Secondary growth is not seen in the monocot plants.