Question

Which of the following exemplifies emergencies?
A. Root hair
B. Stigmatic papillae
C. Prickles of Rosa indica
D. Oil glands on fruit skins

Answer 1

Hint: Plants as we know, have many modifications such as stem, leaves, roots etc. they have a unique way of show-casing danger or sensing danger by exemplifying emergency modifications. They have different ways of taking danger, protecting themselves from predators. Every plant has some kind of viability period and every plant species has it different.

Complete answer:
Option A: Root hair- root hairs are the part of the root modification system. The protruded parts bulging out from the root and are long in structure, staying multiple in number together, are called root hairs. Root hair's function is to transport minerals and nutrients from soil and provide it to the upper parts of the plant.
Option A is not the correct answer.
Option B: Stigmatic papillae- stigma is the female part of the plant reproductive system. It is present at the topmost part of the flower. Some flowers reproduce through sexually and some asexually.
Option B is not the correct answer.
Option C: Prickles of Rosa indica- prickles are modifications from thorns. Thorns are part of the stems. Stems of the plant possess thorns or spines for the protection of the plant. Prickles of Rosa indica, which is a rose, has many thorns.
Option C is the correct answer.
Option D: Oil glands on fruit skin's- oil glands of fruit skins remain to attract pollinators for pollination. In order to remain the viability of fruit.
Option D is not the correct answer.

Hence, Option C is the correct answer.

Note:
Thorns or spines have only one purpose to safeguard the plant from insects, rots, mites and other predators. It just pricks inside the predator’s skin and causes death if they try to attack or steal any fruits. Plants having thorns or spines are- cactus, roses, lilies etc, in cacti as it is a desert plant spine containing water inside them.