Palakol

Bharat Rawal replied | 2 days ago

The best books for teaching spoken English are "How to Teach Speaking" by Scott Thornbury and "Keep Talking" by Friederike Klippel.

These guides focus heavily on classroom fluency, interactive activities, and conversation strategies.

Top Reference Books

"How to Teach Speaking": Practical classroom methodologies. "Keep Talking": Communicative fluency games.

"Discussions A-Z": Ready-made conversation topics.

"English Pronunciation in Use": Audio-linked accent drills.

"Learning Teaching": General ESL lesson management.

Hema Singh replied | 1 day ago

Spoken english by Neetu Singh mam available online too

Pawan Agarwal replied | 6 days ago

A flowering plant has $2n=24$ chromosomes. So, $n=12$.

a) Chromosomes in a pollen mother cell (PMC):

• A pollen mother cell is diploid.

• Hence, it will have $2n=24$ chromosomes. Answer: 24

b) Chromosomes in each microspore after meiosis:

• Meiosis reduces chromosome number to half.

• Each microspore will have $n=12$ chromosomes. Answer: 12

c) Number of meiotic divisions to produce 100 pollen grains:

• Each pollen mother cell undergoes meiosis → produces 4 microspores (pollen grains).

• To produce 100 pollen grains:

Answer: 25

d) Total mitotic divisions for 100 mature male gametophytes:

• Each microspore undergoes 1 mitotic division → forms vegetative cell + generative cell.

• Generative cell undergoes 1 more mitotic division → forms 2 male gametes.

• So, each microspore requires 2 mitotic divisions in total.

• For 100 microspores (pollen grains):

Answer: 200

Bharat Rawal replied | 2 days ago

Here are the solutions to the questions presented in the image:Direct Answers A) 24 B) 12 C) 25 D) 200

Detailed Explanations

A) The number of chromosomes present in a pollen mother cell. Explanation: A pollen mother cell (PMC) is a vegetative/somatic cell of the anther and is diploid ((2n)). Since the plant has (2n = 24), the PMC also contains 24 chromosomes.

B) The number of chromosomes present in each microspore immediately after meiosis.Explanation: Meiosis is a reductional division that halves the chromosome number. The diploid pollen mother cell ((2n = 24)) undergoes meiosis to form haploid ((n)) microspores.

Number of Chromosomes = 24/2 = 12

C) The number of meiotic divisions required to produce 100 pollen grains.Explanation: One pollen mother cell undergoes 1 meiotic division to produce 4 microspores (which develop into 4 pollen grains). 100/4 = 25

D) The total number of mitotic divisions required for the development of 100 mature male gametophytes.Explanation: According to the problem statement, each individual microspore requires two mitotic divisions to become a mature male gametophyte:First mitosis: The microspore divides to form a vegetative cell and a generative cell (1 division).Second mitosis: The generative cell divides to form two male gametes (1 division).

Total for 100 gametophytes: 100 x 2 = 200

Yagnesh replied | 03 Sep

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.