Q:

Which must be true for metamorphism to occur?

A) The grain size must become smaller	B) The process must take place underwater
C) The parent rock must be in solid form	D) The parent rock must be igneous

Answer & Explanation Answer: C) The parent rock must be in solid form

Explanation:

Metamorphism is the method of changing the structure of a rock by using heat and temperature.

Hence, for this to happen the parent rock must be in solid form only. Therefore, option C) is true.

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Q:

Who was discovered Oxygen?

A) John Dalton	B) Thomas Moore
C) Lavoisier	D) Joseph Priestley

Answer & Explanation Answer: D) Joseph Priestley

Explanation:

Joseph Priestley and Carl Wilhelm Scheele both independently discovered oxygen in the year 1774, but Priestly is usually given credit for the discovery.

Who_was_discovered_Oxygen1561116136.jpg image

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Q:

Salts and sugars work to preserve foods by creating a

A) Hypertonic environment	B) Lower pH
C) Depletion of nutrients	D) Lower osmotic pressure

Answer & Explanation Answer: A) Hypertonic environment

Explanation:

Salts and sugars work to preserve foods by creating a Hypertonic environment.

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Q:

What are the UNESCO's focus areas in the cultural field

A) The link between culture and development	B) Action to conserve and protect the world cultural inheritance
C) By assisting member States in studying and preserving both physical and the non Physical heritage of their societies	D) All the above

Answer & Explanation Answer: D) All the above

Explanation:

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Filed Under: World Organisations

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Q:

Which European Country provide its currency for Bank of Central African states

A) France	B) UK
C) Netherlands	D) Germany

Answer & Explanation Answer: A) France

Explanation:

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Filed Under: World Organisations

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Q:

Forbes' 2017 named ______ world's richest man ?

A) Bill Gates	B) Ratan Tata
C) Mukesh Ambani	D) Donald Trump

Answer & Explanation Answer: A) Bill Gates

Explanation:

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Q:

Most of the oxygen transported by the blood is

A) bound to hemoglobin	B) dissolved in plasma
C) dissolved in water	D) in ionic form as solute in plasma

Answer & Explanation Answer: A) bound to hemoglobin

Explanation:

Oxygen is transported throughout the body via hemoglobin in the red blood cells. Hence, most of the oxygen transported by the blood is bounded to hemoglobin.

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Filed Under: Biology
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Q:

Oxygen crosses a plasma membrane by

A) Osmosis	B) Evaporation
C) Concatenation	D) Diffusion

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