Explanation

HIV is a retrovirus, meaning that it carries single-stranded RNA as a genetic material rather than the double-stranded DNA carried by human cells.

Aids way to spread is Touch

AIDS stands for Acquired Immunodeficiency Syndrome.

HIV stands for Human Immunodeficiency Virus.

HIV attacks the immune system of the body 

AIDS virus has single-stranded RNA

AIDS is not a genetic disorder

Explanation

Myopia is a common vision condition in which we can see objects near to us clearly, but objects farther away are blurry.

Myopia means دورکی نظر کی کمزوری

Explanation

 heterozygous sickle cell anemia gives protection against malaria

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Heterozygotes are therefore more resistant to the debilitating effects of malaria than the normal homozygotes.

sickle cells are also resistant to malaria.

Heterozygotes are resistant to malaria

because of their recessive allele, but they lack sickle cell disease because of their dominant allele

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Explanation

Lactometer is used for milk

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A lactometer is an instrument that is used to check for the purity of milk by measuring its density.

 lactometer works on the principle of gravity of milk.

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Explanation

In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube.

Water freeze at 32 F and boils at 212 F

Explanation

Jabir Ibn Hayyan, commonly known as the 'Father of Arab Chemistry',

He was born in Persia, which is now known as Iran, in 721 AD

Notable ideas:

• Use of organic substances in chemistry
• Sulfur-mercury theory of metals
• Science of the balance
• Science of artificial generation

Explanation

Hilal is known as the 'crescent' in astronomical terms.

It's the part of the moon that shows its light visible from the earth.

Hilal appears shortly after sunset on the day that the ijtimak (conjunction) has occured

Explanation

Water-soluble vitamins:

1. vitamin C
2. and the B-complex vitamins, such as vitamin B6, vitamin B12,
3. and folate

must dissolve in water before they can be absorbed by the body, and therefore cannot be stored. 

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بی کمپلیکس وٹامنز اور وٹامن سی پانی میں گھلنشیل وٹامنز ہیں

جو جسم میں محفوظ نہیں ہوتے اور انہیں ہر روز استعمال کرنا چاہیے۔

وٹامن سی، جسے ایکروبک ایسڈ کے نام سے بھی جانا جاتا ہے،

ایک پانی میں گھلنشیل وٹامن ہے،

جس کا مطلب ہے کہ یہ جسم میں ذخیرہ نہیں کیا جا سکتا اور ہمیں اسے غذائی ذرائع سے لینا چاہیے۔

یہ وٹامنز کھانے کی ذخیرہ اندوزی اور تیاری کے دوران آسانی سے تباہ یا دھوئے جا سکتے ہیں۔

ND4-12-2022

Explanation

During exposure to sunlight 7-dehydrocholesterol in the skin absorbs UV B radiation and

is converted to previtamin D3 which in turn isomerizes into vitamin D3.

agm 15.3.2023

Explanation

As the temperature rises, the air absorbs more water molecules and reduces relative humidity. As the temperature drops, the relative humidity rises. As the temperature approaches the dew point, the relative humidity increases.