Explanation

• The word "science" is derived from the Latin word "scientia," which means "knowledge" or "knowing."
• This Latin word is itself derived from the verb "scire," which means "to know."

Explanation

Penicillin is an antibiotic that can be made from the fungus Penicillium notatum or Penicillium chrysogenum.

Penicillin was discovered by Alexander Flaming In 1928

Penicillin was the first true antibiotic

The first patient Albert Alexander, a 43-year-old policeman, was treated with penicillin on 12 February 1941

Alexander Flaming determined that penicillin had an antibacterial effect and published his findings in 1929 

Explanation

Silicon dioxide, also known as silica,

silicon is an oxide of silicon with the chemical formula SiO2, commonly found in nature as quartz.

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related question:

Which one of the following elements are found common in glass, cement, china clay, and quartz?

Explanation

•  When there is no chest rise and fall you will decide to continue CPR on an unconscious patient
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• Cardiopulmonary Resuscitation is meant CPR
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• The compression to ventilation ratio during CPR is:  15:2
•  More than a hundred times per minute  should be the rate of chest compression while doing CPR
• Prolong CPR is suggested for a patient with Electric Shock
• You should compress the chest about 1.5 inches or 4 cm.

Explanation

The tapetum is a layer of nutritive cells found within the sporangium, particularly within the anther, of flowering plants.

It has the ability to provide nourishment for the developing embryo as well as release enzymes and hormones.

Tapetum is important for the development of pollen grains.

Explanation

• DOTS  will be considered while doing first aid of close wound
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• D for Deformity
• O for Open Wound
• T for Tenderness
• S for Swelling

Explanation

Diamond is a poor conductor of electricity

Because all of its carbon atoms are covalently bonded to four other carbon atoms,

Meaning there are no electrons available to move freely and conduct electricity. 

Explanation

Ferromagnetic materials (such as iron, cobalt, and nickel) have a strong attraction to magnetic fields and can retain their magnetism even after the external magnetic field is removed.

This property makes them ideal for making permanent magnets.

• Diamagnetic materials are repelled by magnetic fields and cannot retain magnetism.

• Paramagnetic materials are weakly attracted to magnetic fields but do not retain magnetism after the external field is removed.

Explanation

Lenz's law is consistent with the law of conservation of energy because it states that the induced current will always oppose the change that produced it.

Explanation

The pKb of n-propyl amine is approximately 3.32, indicating its basicity.