Explanation

Direct speech: He said to me, "Why are you sad today?"

Indirect speech rules:

Said to → changes to asked (since it's a question).

Are → was (present to past).

Today → that day (change in time expression).

He asked me why I was so sad that day.

Explanation

All the broken bridges are being repaired by the Engineers.

"Are repairing" is present continuous tense → passive becomes "are being repaired".

Subject (The Engineers) becomes agent at the end: "by the Engineers".

Explanation

Given y = 3:

Step 1: Calculate y³.

y³ = 3³ = 27

Step 2: Calculate y³ - y.

y³ - y = 27 - 3 = 24

Step 3: Calculate y³(y³ - y).

y³(y³ - y) = 27 × 24

= 648

Explanation

Dr. Umar bin Muhammad Daudpota was born on 25 March 1896 (or 1 June 1897) in the village of Talti.

It is located in Sehwan Sharif, Dadu District (now District Jamshoro), British India (present‑day Sindh, Pakistan).

Explanation

Chromosomes are thread-like structures made of DNA and proteins, found in the nucleus of eukaryotic cells.

They carry genetic information and ensure its accurate distribution during cell division.

Explanation

This is a conditional sentence giving a warning or consequence.

Correct sentence: Study hard, or you will fail the test.

("Or" shows the result if you don't study.)

Explanation

The charges of Proton, Electron, Neutron respectively are:

• Proton: Positive charge (+1)
• Electron: Negative charge (-1)
• Neutron: Neutral charge (0)

Explanation

• The first session of the Constituent Assembly of Pakistan was held on 10th August 1947.
• It was held at the Sindh Assembly Building Karachi.
• The period of the First Constituent Assembly of Pakistan was from 10 August 1947 to 24 October 1954.

Explanation

William Wordsworth (1770–1850) was a leading Romantic poet, emphasizing nature, emotion, and individualism in works like "Daffodils" and "The Prelude".

Classical poets (e.g., Alexander Pope) focused on structure and reason.

Wordsworth pioneered Romanticism’s spontaneity and natural beauty.

Explanation

Bacillus refers to rod-shaped bacteria.

Coccus are spherical.

Spirillum are spiral-shaped.