Question

Ankush and Preetam can do a work in 12 days while Preetam and Ashwini can complete the same work in 10 days.If Preetam is 20% less efficient than Ashwini, then in how many days will all the three working together will complete the same work?​

Answer 1

Answer:

i. Epidermis - is the outermost protective layer made up of tabular (flattened) cells.

ii. Endothecium - is sub-epidermal layer made up of radially elongated cells with fibrous

thickenings of callose .

iii. Middle layer - is inner to endothecium and is made up of thin walled cells (1-2

layered), which may disintegrate in mature anther.

iv. Tapetum - is the inner most nutritive layer of anther wall. It immediately encloses the

sporogenous tissue (microspore mother cells