Explanation

The stratospheric ozone layer is Earth's “sunscreen”  protecting living things from too much ultraviolet radiation from the sun.

Oxygen layer in the atmosphere

Ozone protects us from the harmful ultraviolet radiation of the sun.

Ozone formula: O3

The ozone layer lies approximately 15-40 kilometers (10-25 miles) above the Earth's surface, in the stratosphere.

The ozone layer is depleting: Air pollution

ND17-7-2023

Explanation

Biology

Life and living organisms, including their structure, function, growth, evolution, and interaction with their environment.

Geology
The Earth, its materials (rocks, minerals), structure, and the processes that shape it (earthquakes, volcanoes, plate tectonics).

Chemistry

Matter, its properties, how it interacts, combines, and changes (chemical reactions, molecular bonds, atomic structure).

Physics:

The fundamental forces and principles of the universe, such as energy, motion, force, and the nature of matter.

Explanation

An ornithologist is someone who studies ornithology the branch of science devoted to birds.

Ornithology means پرندوں کا مطالحہ

ND5-5-2023

Explanation

• A cataract is a clouding of the lens in the eye that affects vision.
• It is a common age-related condition that can cause blurry vision, double vision, and sensitivity to light.
• Cataracts can be treated with surgery to remove the cloudy lens and replace it with an artificial lens.

Explanation

The main constituent of hemoglobin is iron.

Hemoglobin transports oxygen and exhibits a quaternary protein structure.

Iron is crucial for hemoglobin formation; its deficiency can impact hemoglobin production.

Heme in hemoglobin is protoporphyrin IX.

Infants reach adult hemoglobin levels by the end of their first year.

Ferric ions are not part of hemoglobin.

Hemoglobin is found dissolved in plasma.

Explanation

• The nervous system is the body system that controls and coordinates the functions of all other organ systems.
• It allowing for integration and regulation of various bodily functions.
• It consists of the brain, spinal cord, nerves, and sensory organs.

Explanation

Tooth enamel is the white, visible part of the tooth and it is also the hardest part of the human body.

 The main mineral composition is hydroxyapatite, a crystalline of calcium phosphate.

Explanation

Herpetology is the scientific study of reptiles and amphibians.

It includes the study of their biology, behavior, ecology, and conservation.

Explanation

Astronomy is the study of everything in the universe beyond Earth's atmosphere.

That includes objects we can see with our naked eyes, like the Sun , the Moon , the planets, and the stars 

Explanation

Thermal energy is produced during fission reactions in nuclear reactors, which is used to generate electricity.