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Q:

If a tropical rain forest is removed, it does not regenerate quickly as compared to a tropical deciduous forest. This is because 

A) The soil of rain forest is deficient in nutrients B) Propagules of the trees in a rain forest have poor viability
C) The rain forest species are slow growing D) Exotic species invade the fertile soil of rain forest

Answer:   A) The soil of rain forest is deficient in nutrients



Explanation:
Subject: General Science
Q:

How many cups in a quart?

A) 2 B) 3
C) 4 D) 1
 
Answer & Explanation Answer: C) 4

Explanation:

1 quart = 4 cups.

=> We know that 1 quart = 2 pints

But 1 pint = 2 cups

=> 2 pints = 2 x 2 cups = 4 cups = 1 quart.

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2 86
Q:

Lichens are the best indicator of

A) Air pollution B) Sound pollution
C) Noise pollution D) Water pollution
 
Answer & Explanation Answer: A) Air pollution

Explanation:

1. Lichens are plants that grow in exposed places such as rocks or tree bark.

 

2.  Lichens are widely used as environmental indicators or bio-indicators. They can be used as air pollution indicators, especially of the concentration of sulfur-di-oxide in the atmosphere.  

 

3. They need to be very good at absorbing water and nutrients to grow there.

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2 63
Q:

What is Iron Ore used for?

A) Aluminium B) Copper
C) Steel D) Brass
 
Answer & Explanation Answer: C) Steel

Explanation:

The primary use of iron ore is in the production of iron. Most of the iron produced is then used to make steel. Steel is used to make automobiles, locomotives, ships, beams used in buildings, furniture, paper clips, tools, reinforcing rods for concrete, bicycles, and thousands of other items.

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3 80
Q:

Which of the following is not an intensive property?

A) Weight B) Density
C) Refractive index D) Melting point
 
Answer & Explanation Answer: A) Weight

Explanation:

An intensive property is a physical quantity whose value does not depend on the amount of the substance for which it is measured. For example, the temperature of a system in thermal equilibrium is the same as the temperature of any part of it. If the system is divided the temperature of each subsystem is identical. The same applies to the density of a homogeneous system, if the system is divided in half, the mass and the volume change in the identical ratio and the density remains unchanged. Additionally, the boiling point of a substance is another example of an intensive property. For example, the boiling point for water is 100 °C at a pressure of one atmosphere, a fact which remains true regardless of quantity.

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5 105
Q:

Which layer of the atmosphere contains the ozone layer?

A) Troposphere B) Stratosphere
C) Thermosphere D) Mesosphere
 
Answer & Explanation Answer: B) Stratosphere

Explanation:

The ozone layer is a region of Earth's Stratosphere that absorbs most of the Sun's ultraviolet (UV) radiation. It contains high concentrations of ozone (O3) in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere.

 

The Atmosphere is divided into 4 layers according to major changes in temperature. They are :

1. Troposphere,

2. Stratosphere,

3. Mesosphere  and

4. Thermosphere.

The farther away from earth, the thinner the atmosphere gets.

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6 114
Q:

Eugenics is the study of

A) impair the racial qualities of future generations either physically or mentally B) different races of mankind
C) genetic of plants D) people of European origin
 
Answer & Explanation Answer: A) impair the racial qualities of future generations either physically or mentally

Explanation:

Eugenics is the study of altering human beings by changing their genetic components.

 

It is the study of the agencies under social control that may improve or impair the racial qualities of future generations either physically or mentally.

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2 61
Q:

Where are the Macronutrients located on a Nutritional Label?

A) On the Top B) On the Right
C) On the Bottom D) On the Left
 
Answer & Explanation Answer: A) On the Top

Explanation:

Macronutrients are located on the Top of a Nutritional Label.

Macronutrients are essential substances that the body needs to survive and develop. There are 3 main Macronutrients:

1. Fats

2. Proteins (and)

3. Carbohydrates.

The nutritional label is an important part of any food package. Since the Macronutrients refer to a list of nutrients that we need daily in a pretty large amount are the most important nutrients to sustain our living, commonly they are written on the top of the Nutrition Labels.

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4 92
Q:

A Disease which spreads by contact?

A) Infectious B) Fatal
C) Incurable D) Contagious
 
Answer & Explanation Answer: D) Contagious

Explanation:

A Disease which spreads by contact are Contagious.

Infectious diseases : These are caused by microscopic germs such as bacteria or viruses that get into the body and cause problems. Some but not all infectious diseases spread directly from one person to another. Infectious diseases that spread from person to person are said to be contagious. Some infections spread to people from an animal or insect, but are not contagious from another human. 

Contagious diseases such as the flu, colds, or strep throat spread from person to person in several ways. One way is through direct physical contact, like touching or kissing a person who has the infection. Another way is when an infectious microbe travels through the air after someone nearby sneezes or coughs.

Fatal Diseases : Diseases leading to failure or disaster.

Incurable Diseases : Diseases of a sick person not able to be cured.

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