Explanation

The ostrich egg is the largest cell in the animal kingdom.

It can weigh up to 1.4 kg.

Explanation

The 4R-8R (48) Principle stands for a combination of strategies like Refuse, Reduce, Reuse, Recycle and 8 more Rs (like Rethink, Repair, Recover, etc.).

It is applied to minimize pollution caused by non-biodegradable waste by promoting sustainable practices.

Explanation

Cholera means ہیضہ

Typhoid means ایک قسم کا بخار

Typhoid and cholera spread through contaminated water, especially in areas with poor sanitation.

They are classic examples of water-borne diseases caused by bacteria like Salmonella typhi and Vibrio cholerae.

Explanation

Plantation agriculture involves growing a single cash crop like tea, coffee, rubber, or cotton on a large scale.

These crops are mainly used in industries and factories for processing and export.

Explanation

Flatworms (phylum Platyhelminthes) have unsegmented, flat bodies.

Earthworms and tapeworms have segmented bodies.

Explanation

Endosperm is the part of the seed that stores food to nourish the developing embryo.

It provides essential nutrients like starch, proteins, and oils during germination.

Explanation

Couple is not a part of a microscope; it's unrelated terminology in this context.

Stage, Course Adjustment, and Mirror are essential components of a microscope used for holding slides, focusing, and reflecting light, respectively.

Explanation

Bacteria and fungi are decomposers that break down dead plants and animals.

They recycle nutrients back into the ecosystem, maintaining ecological balance.

Explanation

The cochlea is a spiral-shaped organ in the inner ear responsible for converting sound vibrations into nerve signals.

It contains hair cells that detect sound and send signals to the brain via the auditory nerve.

Explanation

Cornea is the transparent, dome-shaped front part of the eye.

It allows light to enter and helps focus it onto the retina.