Question

In maize, the fibrous roots develop from
A) Lower nodes
B) Upper nodes
C) Upper internodes
D) None of the above

Answer 1

Hint: Roots are the vital underground part of all plants. This part of the plant is principally accountable for anchoring it down into the bottom of the ground and absorbing the essential mineral components, nutrients, and water from the soil. It additionally is accustomed to stored food.

Complete answer:
There are two types of roots- fibrous roots and taproots. Fibrous roots are formed by skinny, moderately branching roots growing from the stem. A fibrous system is universal in monocotyledonous plants and ferns. The fibrous root systems seem like a mat created out of roots once the tree has reached full maturity. Most trees begin life with a taproot, however, once one to a couple of year’s modification to a wide-spreading fibrous system within the main surface roots and solely a couple of vertical, deep anchoring roots. A typical mature tree 30–50 m tall incorporates a system that extends horizontally in all directions as so much because the tree is tall or additional, however, it runs over ninety-fifth of the roots area unit within the high fifty cm depth of soil. Some of the examples of fibrous roots are coconut palm, grass, etc.
A taproot may be a massive, central, and dominant root from that different roots sprout laterally. Usually, a taproot is somewhat straight and extremely thick, is tapering in form, and grows directly downward. In some plants, like the carrot, the taproot may be a storage organ therefore well-developed that it's been cultivated as a vegetable. The taproot system contrasts with the accidental or fibrous scheme of plants with many-branched roots, however, several plants that grow a taproot throughout germination prolong to develop branching root structures, though some that place confidence in the most root for storage could retain the dominant taproot for hundreds of years, as an example, gymnosperm Welwitschia.

The correct option is A.

Note:
In maize, the fibrous root is a nodal system, i.e, wherever the roots originate among the lower stem nodes of the plants, whereas the majority of the basis system grows from the five nodes below the soil surface, brace roots that grow from nodes present higher than the soil surface brace the plant from winds.