Organisation of stem apex into corpus and tunica is determined mainly by:
Correct answer: A. Planes of cell division
- A. Planes of cell division
- B. Regions of meristematic activity
- C. Rate of cell growth
- D. Rate of shoot tip growth
Explanation
The tunica corpus concept was given by Schmidt (1924) which was based on a plane of divisions of cells. According to this concept, there are two portions in shoot apextunica and corpus. The tunica shows only anticlinical divisions and thus it is responsible for surface growth. The corpus shows divisions in all planes and is thus responsible for volume growth.
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About Growth and Development
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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