Explanation

Nitrogen makes up about 78% of Earth's atmosphere,

It is the most abundant gas.

It is essential for plant growth as.

It is a key component of proteins and DNA.

Nitrogen is the chemical element with the symbol N and atomic number 7.

It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772.

Explanation

 A convex lens is thicker at the centre than at the edges. 

A camera uses a convex lens to focus light rays and form an image on a piece of film or a digital sensor at the back, capturing the scene in front of it.

Explanation

Explanation

When a quadratic polynomial (degree 2) is divided by a linear factor (degree 1), the quotient will have a degree one less than the original polynomial.

That means the result will be a linear polynomial (degree 1).

Explanation

The cube roots of unity are 1, ω, and ω², where ω = -1 + √3i / 2 and ω² = -1 - √3i / 2.
Their product is 1 × ω × ω² = 1.

Explanation

The sum of the interior angles of a quadrilateral is 360°.
Since 1 right angle = 90°, the sum equals 4 right angles (4 × 90° = 360°).

Explanation

Dexterity means مہارت

Skill means مہارت

Explanation

A verb phrase consists of a main verb and its auxiliaries.
In this sentence, will have been studying is a combination of auxiliary verbs (will have been) and the main verb (studying), forming a future perfect continuous tense.

Explanation

There are two kinds of adjective clauses:

1.       Restrictive

2.      Non-restrictive.

An adjective clause describes a noun and begins with a relative pronoun like that or which.

In this sentence it describes the fruit by specifying how it is grown.

Explanation

The shopkeeper asked the man what kind of books he needed.

• The sentence is converted from direct to indirect speech, so "said to" changes to "asked" (since it's a question).
• "Do you need" (present simple) changes to "he needed" (past simple) in reported speech.