Explanation

The substance universally used to achieve the ultra-low temperatures required for the cryopreservation of biological samples is liquid nitrogen.

Nitrogen, in its liquid state, is the primary agent used to freeze and store cells, tissues, and organs. 

Liquid nitrogen provides an inert, ultra-low temperature environment of -196 °C (-321 °F),

Which effectively halts all biological activity and molecular motion, preserving the material for extended, even indefinite, periods. 

Explanation

Eli Whitney invented the Cotton Gin in 1794 to separate cotton fibers from seeds efficiently.

This invention revolutionized the cotton industry and boosted production.

Explanation

Plants produce sugar and starch using sunlight through photosynthesis.

It is a process where light energy converts carbon dioxide and water into glucose and oxygen.

Explanation

CO₂ is absorbed by plants during photosynthesis to produce glucose and oxygen.

This process transfers carbon from the atmosphere to living organisms.

Explanation

Amphoteric substances are those that can react with both acids and bases.

They can donate or accept protons (H+ ions), depending on the conditions.

Examples of amphoteric substances include water (H2O), amino acids, and certain metals like zinc and aluminum.

Explanation

The temperature increases with an increase in Pressure in a closed system, or in specific atmospheric layers like the stratosphere or thermosphere.

Explanation

• Pollution is the introduction of harmful or poisonous substances into the environment, causing damage to the air, water, and land.
• This can have harmful effects on human health, wildlife, and the ecosystem as a whole.

Explanation

A solar eclipse can only take place during the phase of the new moon

when the moon passes directly between the sun and Earth and its shadows fall upon Earth's surface.

Explanation

Entomology is the study of insects and their relationship to humans, the environment, and other organisms.

while

Zoology is the study of all animals.

Biology is a natural science concerned with the study of life and living organisms.

Etymology investigates and documents the lives.

Explanation

A hutch is a type of cage used typically for housing domestic rabbits.

Other small animals can also be housed in hutches such as guinea pigs, ferrets,