Some vascular bundles are described as open because these
Correct answer: B. Are capable of producing secondary xylem and phloem
- A. Are surrounded by pericycle but no endodermis
- B. Are capable of producing secondary xylem and phloem
- C. Possess conjunctive tissue between xylem and phloem
- D. Are not surrounded by pericycle.
Explanation
(b) : In dicot stem, cambium is present between xylem and phloem, such vascular bundles are called open. In monocot stem, the cambium is absent, such vascular bundles are called closed. Cambium are the meristematic cells which produces secondary xylem and phloem
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About Support and Movement
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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