Kolkata

Vineeta Tirunagari replied | 1 day ago

English Grammar and Composition by WREN & MARTIN this is the best book for English and I can guarantee it.

Mamon Das replied | 15 hrs ago

I would recommend for teaching spoken English- English Grammar in Use by Raymond Murphy. I also place a strong emphasis on practical application, encouraging learners to use English through discussions, interactive activities and everyday communication. This allows them to develop greater fluency, improve their expression and become more confident speakers.

Yagnesh replied | 1 day ago

Please don't feel that you have to start learning English all over again. You already have years of experience studying and teaching it. After being away from work for 12 years, it is natural to feel a little rusty and lose confidence.

Start slowly. Spend 15–20 minutes every day revising basic grammar and another 15 minutes speaking in English about your daily life. Read a little, listen to English conversations, and try explaining simple grammar topics aloud as if you are teaching a student.

Don't worry about making mistakes. With regular practice, your confidence will gradually come back. You already have the foundation—you just need to bring it back through practice.

Saurabh replied | 1 day ago

a) Chromosomes in a pollen mother cell
A pollen mother cell (PMC) is diploid (2n).= 24 Chromosome 

b)Chromosomes in each microspore after meiosis

Meiosis reduces the chromosome number to haploid (n). = 12 Chromosome 

c) Meiotic divisions required to produce 100 pollen grains

One pollen mother cell undergoes one meiosis and produces 4 microspores.

Number of PMCs required:

Each PMC undergoes one meiotic division.

Answer: 25

d) Total mitotic divisions for 100 mature male gametophytes

Each microspore undergoes:

1st mitotic division → vegetative cell + generative cell

2nd mitotic division of generative cell → 2 male gametes

So, 2 mitotic divisions per microspore.

For 100 microspores:

100×2= 200mitotic division