Explanation

Homer is the presumed author of the Iliad and the Odyssey, two hugely influential epic poems of ancient Greece. 

Homer is considered one of the most revered and influential authors in history.

Born: c. 8th century BC

Died: Ios

ND28-4-2023

Explanation

• Approximately 7–8% of an adult’s body weight.
• Approximately 8–9% of a child’s body weight.
• Approximately 9–10% of an infant’s body weight.

=========

Blood is a body fluid present in animals that consists of plasma, white blood cells, red blood cells, and platelets.

Humans have around 5 liters of blood in their bodies.

The volume of blood is approximately 5.5 liters in each adult male and 4.5 liters in female.

Explanation

Hydrogen and helium are the two lightest gases.

Helium is the second most abundant element in the universe, after hydrogen.

Helium has monatomic molecules.

It is the lightest of all gases except hydrogen.

Hydrogen is the lightest gas known.

It provides the maximum lift for balloons due to its very low density.

Explanation

Explanation

When someone receives an “eye transplant,” they are given a donor cornea, the clear front part of the eye.

The corneal transplant requires a functioning retina and optic nerve to restore vision.

ND12_8_2023

Explanation

The heart consists of four chambers in which blood flows.

Blood enters the right atrium and passes through the right ventricle.

The right ventricle pumps the blood to the lungs where it becomes oxygenated.

Explanation

Charles Darwin is often credited with "discovering" evolution.

He wrote about evolution from 1748 to 1859

It was the year when he published On the Origin of Species.

Explanation

Mercury is the only metal that is liquid at normal temperatures. 

****

Chemical compounds of mercury have found uses in batteries, in biocides in the paper industry, in paints, and on seed grain, as antiseptics in pharmaceuticals, as reagents in laboratories, and as catalysts.

Four other elements are liquids slightly warmer than room temperature.

They are:

• francium
• cesium
• gallium
•  rubidium

ND31-12-2022

SH10-8-2023

Explanation

Vitamin A deficiency can be caused by inadequate intake, poor fat absorption, or liver disease.

Deficiency impairs immunity and blood formation, causing skin rashes and typical eye symptoms (xerophthalmia, night blindness, etc.).

Carrot is a good source of Vitamin A.

Night blindness means رات کا اندھا پن 

Explanation

Demography is the statistical study of the human population, including aspects such as size, structure, distribution, and dynamics.

It examines factors like birth and death rates, migration, age, sex, and occupation, among others.

انسانی آبادی کا شماریاتی مطالعہ ڈیموگرافی کہلاتا ہے۔