Explanation

Telescope: It is a device used to see distant objects.

The word telescope was coined in 1611 by the Greek mathematician Giovanni Demisiani 

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ND22-1-2023

Explanation

The breakdown of CFCs releases chlorine, which then acts as a catalyst for the destruction of the ozone layer.

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ND22-1-2023

Explanation

The form of cell division known as mitosis is responsible for the body's expansion and repair.

while

Gametes are created as a result of the cell division process known as meiosis.

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ND22-1-2023

Explanation

• The stomach is an organ involved in digestion, not waste elimination.

1. Lungs: remove carbon dioxide through exhalation
2. Kidneys: filter waste and excess substances from the blood, producing urine
3. Skin: removes waste through sweating
4. Liver: detoxifies harmful substances and aids in their removal

Explanation

Gregor Mendel: a scientist (from Austria)

Explanation

A rectifier is an electrical device that converts alternating current (AC),

which periodically reverses direction, to direct current (DC), which flows in only one direction.

Explanation

Short-sightedness is caused due to elongation of the eyeball

 It also may result when the curve of the cornea is too steep. 

The messages sent from the retina to the brain are perceived as blurry

Explanation

• Structure of DNA was discovered by James Watson and Francis Crick in 1953.
• They discovered the double-helix structure of DNA using X-ray crystallography data.
• Their discovery revealed the double-helix structure of DNA, where two complementary strands are twisted together with sugar and phosphate molecules, and the nitrogenous bases (adenine, thymine, cytosine, and guanine) pair in a specific manner.

Explanation

The ozone layer is a thin part of the Earth's atmosphere that absorbs almost all of the sun's harmful ultraviolet light.

Ozone is made of O3.