10
Q:

What is the most common form of iodine deficiency? 

Answer:



Q:

What is the main component of bones and teeth?

A) Calcium Phosphate B) Calcium Carbonate
C) Calcium Nitrate D) Calcium Sulphate
 
Answer & Explanation Answer: A) Calcium Phosphate

Explanation:

The main component of bones and teeth is Calcium Phosphate.

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Q:

Ozone holes are more pronounced at the

A) Tropic of cancer B) Poles
C) Equator D) Tropic of capricorn
 
Answer & Explanation Answer: B) Poles

Explanation:
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Q:

Which of the following causes tornadoes?

A) condensation B) dry climates
C) wind shear D) stationary fronts
 
Answer & Explanation Answer: B) dry climates

Explanation:

Conditions suitable for the formation of a tornado develop when varying temperatures and humidity come together and form thunderclouds. This refers to the presence of warm and moist condition in the lower atmosphere and cold and dry conditions in the upper atmosphere. The place where these varying masses of air meet is known as the dry-line. Such conditions, which are suitable for the formation of a tornado, are most often observed just before a low pressure system develops.

 

Once the ideal conditions occur, the warm air tries to rise in the atmosphere, while the cold air blocks it. This makes the air in between rotate horizontally. In the meanwhile, the land is heated by the Sun, and hence, the air near the ground becomes warm and starts rising. Continuous fueling by the heat energy from the Sun ensures that the warm air has an upper hand over cold air. As a result of this, the cold air at the top starts sinking and the warm air below starts rising in a spinning motion. As the amount of warm air increases, the formation gains height and becomes intense. The intensity of these devastating tornadoes is such that they can clear off anything that comes in their path.

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0 53
Q:

The gas predominantly responsible for global warming is

A) Carbon monoxide B) Nitrous oxide
C) Nitrogen peroxide D) Carbondioxide
 
Answer & Explanation Answer: D) Carbondioxide

Explanation:

72% of the totally emitted greenhouse gases is carbon dioxide.

 

Hence, Carbon dioxide (Co2) is predominantly responsible for Global warming.

 

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0 78
Q:

Alcohol first impairs your

A) hearing skills B) colour recognition
C) judgement D) heart
 
Answer & Explanation Answer: C) judgement

Explanation:

The reason why drunk people acts like stupids is when they drink, especially if they drink a lot, first their brain becomes impaired by such large quantities of alcohol that it cannot operate properly. So they cannot judge anything.

 

Hence, Alcohol first impairs your Judgement.

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0 92
Q:

Study of fishes is called

A) Amphiology B) Phylumology
C) Zoology D) Ichthyology
 
Answer & Explanation Answer: D) Ichthyology

Explanation:

Ichthyology is the branch of biology devoted to the study of fish.

 

It is also known as Fish science which includes bony fishes (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha).

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0 141
Q:

The longest period of prenatal development is the

A) Germinal period B) Fetal period
C) Embryonic period D) None
 
Answer & Explanation Answer: B) Fetal period

Explanation:

The third and longest period of prenatal development, extending from the ninth week until birth is Fetal period.

 

The process of prenatal development occurs in three main stages. The first two weeks after conception are known as the germinal stage, the third through the eighth week are known as the embryonic period, and the time from the ninth week until birth is known as the fetal period.

 

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0 199
Q:

Which of the following foods does not support bacterial growth?

A) Raw carrots B) Sauted onions
C) Refried beans D) Cooked rice
 
Answer & Explanation Answer: A) Raw carrots

Explanation:

Cooked food create an enabling environment for bacteria to grow because of their moisture content and because of the normal temperature of the food. Raw food does not offer suitable conditions for bacteria growth. 

 

Hence, raw carrots does not support bacterial growth.

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