The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is:
Correct answer: D. Maturing
- A. Elongating
- B. Widening
- C. Differentiating
- D. Maturing
Explanation
Annular and spiral thick carrier elements usually develop in the protoxylem when the roots or stems are maturing. The maturity of the root or stem is the development of the parts so that the plant can easily become a tree. This is the time when the protoxylem develops or produces annular and spiral thick carrier elements. They also grow plants to provide mechanical support.
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About Kingdom Plantae
Plants are multicellular, photosynthetic eukaryotes with cellulose cell walls, chloroplasts and large vacuoles. Coverage includes alternation of generations, vascular and non-vascular plants, seedless and seed-producing groups, gymnosperms and angiosperms, and the distinction between monocot and dicot features.
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