Question

The leave of Mimosa pudica (sensitive plant) droops down on touch because
A. Plants have a nervous system
B. The leaves are very tender
C. The leaf tissue is injured
D. The turgor pressure of leaf base changes.

Answer 1

Mimosa pudica is a blossoming plant of the pea/vegetable family Fabaceae and Magnoliopsida taxon. It is regularly developed for its interest and esteem. The compound leaves overlay internal and hang when contacted or shaken, protecting themselves from damage, and re-open a couple of moments later.

Complete answer:
1. The Mimosa plant creases the leaflets on stimulus with contact. The stimulus is given to the whole branch and afterward the entire plant with all the leaflets close. There is lost water from the cells at the base of the leaf. This is because of the death of the drive which causes an adjustment in the turgor pressure in the cells making leaves to shut. In this way, the right answer is choice D.
2. Plants don't have a sensory system, yet they do appear to have a technique for speaking with each other. As it were, it resembles their sort of sensory system. So, option A is incorrect.
3. The leaves are pinnately compound, with a couple of pinnae sets, and 10–26 flyers for every pinna. So, option B is incorrect.
4. The leaf is an assortment of tissues which include: The epidermis which covers the upper and lower surfaces. The mesophyll inside the leaf which is wealthy in chloroplasts. The veins contain the vascular tissue (where xylem and phloem are available). So, option C is incorrect.

So, the correct answer is “Option D The turgor pressure of leaf base changes.”.

Note: At the point when the leaves of the Mimosa are contacted, there are an adjustment in the focus inclination of potassium and chloride particles inside two kinds of cells, the flexor and extensor cells, inside the pulvinus of the plant. The pulvinus is the "pivot like" zone of the plant where the handout associates with the midrib, and the midrib interfaces with the stem. Water is directed from the extensor cells, situated on the top side, to the flexor cells, situated on the base side of the pulvinus.