Type of sclerenchyma cells found in seed coats are:
Correct answer: C. Sclereids
- A. Fibers
- B. Tracheids
- C. Sclereids
- D. Vessels
- E. Both A and C
Explanation
There are two types of sclerenchyma: (1) fibers, which are long, very narrow cells with sharply tapering end walls; and (2) sclereids, which are isodiametric to irregular or branched in shape. Fibers are found in the pericycle, xylem and phloem. Sclereids are present in hard seed coats and fruit walls.
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Support and movement covers the axial and appendicular skeleton, bone structure, joints and the arrangement of skeletal muscles. Muscle contraction is explained through actin, myosin, sliding filaments, calcium ions and ATP, while arthritis is distinguished as a disorder of joints rather than a normal part of movement.
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