In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues?
Correct answer: C. Flowers, fruits and leaves
- A. All parts
- B. Stem and root
- C. Flowers, fruits and leaves
- D. Shoot tips and root tips
Explanation
The tissues which develop from apical meristem and procambium are known as primary tissues and these constitute the primary structures of the plant body. The development of the primary tissues causes the stem to grow in length and to some extent in thickness. Stem and roots in dicotyledons show secondary growth as they have the development of secondary vascular tissues (i.e., secondary xylem and secondary phloem) in them. Flowers, fruits, and leaves are primary tissues.
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Embryonic development covers fertilization, cleavage, formation of the blastula and gastrula, germ layers, organ formation and differentiation. Regeneration describes the replacement of lost tissues or body parts, whereas ageing involves gradual cellular and physiological changes linked to reduced repair, altered metabolism and declining organ function.
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