Question

Bark refers to
A. Phellem + Phellogen + Phelloderm
B. Periderm + Cortex
C. Phellem + Phelloderm + Secondary Phloem
D. Periderm + Cortex + Pericycle + Secondary Phloem

Answer 1

Hint: Bark is a term referred to define all the tissues outside vascular cambium. The external layers of the bark are being always peeled off on report of the construction of new secondary vascular tissues in the middle. The bark is insect repellent, erosion proof, fire-proof as well as acts as a heat screen.

Complete answer: Bark is the outermost layers of stems as well as roots of woody plants. Plants with bark consist of trees, woody vines, as well as shrubs. Bark relates to all the tissues outer the vascular cambium as well as it has a nontechnical term. It blankets the wood and contains the main bark along with the outer bark. The central bark, that is in older stems living tissue, comprises the innermost layer of the periderm. The external bark on older stems contains the dead tissue on the ground of the stems, along with parts of the extreme periderm as well as all the tissues on the outer side of the periderm. The outer bark on trees that lies outside of the living periderm is also called the rhytidome.
Thus, the right answer to the question is option – D “Periderm + Cortex + Pericycle + Secondary Phloem”.

Note: Products derived from bark include: bark shingle siding and wall coverings, spices and other flavourings, tanbark for tannin, resin, latex, medicines, poisons, various hallucinogenic chemicals, and cork. Bark has been used to make cloth, canoes, and ropes and used as a surface for paintings and map-making.