Explanation

• The greenhouse effect causes global warming
• When heat-trapping gases in Earth's atmosphere absorb and re-emit outgoing infrared radiation, raising global temperatures
• Natural Effect: Keeps Earth warm and supports life.
• Main Gases: CO₂, methane (CH₄), water vapor, and N₂O.
• Excess CO₂: Increases the greenhouse effect.

Last updated 27-07-2026 by NA

Explanation

A biological species is a group of organisms

that can reproduce with one another in nature and produce fertile offspring.

**

ND17-1-2023

Explanation

In 1928, at St. Mary's Hospital, London, Alexander Fleming discovered penicillin.

******

ND30-12-2022

Explanation

Atherosclerosis, sometimes called "hardening of the arteries,"

Atherosclerosis occurs when fat, cholesterol and other substances build up in the walls of arteries

These deposits are called plaques.

***

ND11-12-2022

Explanation

 Liver is the largest gland of human body.

 Thyroid Gland is located in Neck. 

Explanation

 vitamin D to absorb calcium and promote bone growth. 

It plays a crucial role in maintaining the balance of calcium in your blood and bones and in building and maintaining bones.

More specifically, you need vitamin D so your body can use calcium and phosphorus to build bones and support healthy tissues.

Explanation

Gun powder is a mixture of sulphur, charcoal and potassium nitrate (KNO3).

Explanation

Malaria is caused by Plasmodium parasites.

The parasites are spread to people through the bites of infected female Anopheles mosquitoes, called "malaria vectors.

Explanation

• Protein fibers like actin and myosin take part in muscle: Contraction
• ***
• Muscles are composed of two major protein filaments:
• a thick filament composed of the protein myosin and a thin filament composed of the protein actin.
• Muscle contraction occurs when these filaments slide over one another in a series of repetitive events.
  

Explanation

Jupiter is the biggest planet

It is the largest planet in the Solar System according to size.

Saturn is the second largest planet in our solar system.

Mercury Planet has the smallest diameter

Moon One is not a planet

Venus planet has no moon

Saturn planet has the highest number of moons

Mars is sometimes called the Red Planet.

**

These are the 8 planets

1. Mercury

2. Venus

3. Earth

4. Mars

5. Jupiter

6. Saturn

7. Uranus

8. Neptune