LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

BIOTECHNOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A rhizome is a(n):
A
Plant cutting.
B
Underground stem.
C
Flower.
D
Bulb.
Explanation: 

Detailed explanation-1: -rhizome, also called creeping rootstalk, horizontal underground plant stem capable of producing the shoot and root systems of a new plant. Rhizomes are used to store starches and proteins and enable plants to perennate (survive an annual unfavourable season) underground.

Detailed explanation-2: -A rhizome (also known as rootstocks) is a type of plant stem situated either at the soil surface or underground that contains nodes from which roots and shoots originate (shown below). Rhizomes are unique in that they grow perpendicular, permitting new shoots to grow up out of the ground.

Detailed explanation-3: -Rhizomes are underground stems that are fleshy. They have multiple growth points or eyes, similar to potatoes, and grow underground or immediately at ground level. A few plants have rhizomes that grow over the ground or are located near the soil’s surface.

Detailed explanation-4: -Underground stems are modified plant parts that derive from stem tissue but exist under the soil surface. They function as storage tissues for food and nutrients, in propagation of new clones, and in perennation (survival from one growing season to the next).

Detailed explanation-5: -Rhizomes are plant stems, but they differ significantly from upright-growing above-ground plant stems, which is why they are also described as modified stems. Unlike plant stems, rhizomes have more functions than mechanically supporting the plant and sending out new shoots. Unlike roots, rhizomes have nodes.

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