Explanation

Laser technology is used in optical disks (like CDs and DVDs).

It allowing for precise data storage and retrieval.

Explanation

Short cut key to saving any document in MS office is Ctrl+S.

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Explanation

Cells are the basic building blocks of all plants and animals.

It forming the fundamental structure and function of living organisms.

Explanation

Explanation

• A is the mother of B and C (so, A is the parent of C).
• D is the husband of C (so, D is the spouse of C).
• Therefore, A is the mother-in-law of D (the parent of D's spouse).

So, the relationship between A and D is that of mother-in-law and son-in-law.

Explanation

Pakistan has three big sea ports named as Karachi Port, Muhammad Bin Qasim port, and Gwadar port.

Port of Muhammad Bin Qasim is the oldest port while the Karachi port is the busiest one.

Gwadar (Balochistan) is the biggest sea port of Pakistan.

AGM  5.2.23

Explanation

The shortcut key for redoing the last action in Microsoft Office is CTRL+Y.

CTRL+Z ___ Undo last action.

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• Copy: Ctrl+C
• Cut: Ctrl+X
• Paste: Ctrl+V

Explanation

The correct use of tenses is: "Your mother had been waiting for you when you went to your friend's house."

This sentence correctly uses the past perfect continuous tense to describe an action that was ongoing in the past before another past action.

Explanation

The sentence "She sings a song" is in the present simple tense.

In this sentence, "sings" is the verb in the present simple form,

which indicates an action that regularly happens or is true in the present.

In this context, it means that "she" (the subject) regularly performs the action of singing a song.

Explanation

To arrange the groups in increasing order of species richness (i.e., from fewest to most species), let's look at general estimates of known species:

• Mammals – ~6,400 species
• Reptiles – ~11,000 species
• Fishes – ~34,000 species
• Insects – Over 1 million described species (possibly several million undiscovered)