Questions

Q:

Which statement correctly describes the role of chance in evolution?

A) An allele that increases evolutionary fitness cannot be lost from a population by chance events. B) The ultimate source of new alleles is mutation, random changes in the nucleotide sequences of an organism's DNA
C) Evolutionary change proceeds by an accumulation of changes that occur by chance. D) None of the above
 
Answer & Explanation Answer: B) The ultimate source of new alleles is mutation, random changes in the nucleotide sequences of an organism's DNA

Explanation:
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Q:

Which metal is the best conductor of heat?

A) Silver B) Gold
C) Copper D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Silver is the best conductor of both heat and electricity among metals with a thermal conduction value of about 430 W/(mK).

Gold and copper both come respectably close to silver.

 

Copper being significantly less costly it is often chosen over silver in many applications.

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Q:

A lunar eclipse occurs when

A) The Sun, the Earth and the Moon are in a straight line B) The Moon, and The Earth are in a straight line
C) The Sun and the Earth are in a straight kine D) The Sun and the Moon are in a straight line
 
Answer & Explanation Answer: A) The Sun, the Earth and the Moon are in a straight line

Explanation:

An eclipse happens when a planet or a moon gets in the way of the sun's light. Our planet Earth experiances two types of eclipses. They are Solar and Lunar eclipses.

 

Solar Eclipse : This occurs when The Sun, the Moon and the Earth are in a straight line. The moon being in middle blocks sun rays falling on the Earth.

 

Lunar Eclipse : The Sun, the Earth and the Moon are in a straight line. The Earth being in middle and moon in the shadow of Earth behind it.

a_lunar_eclipse_occurs_when1560750613.jpg image

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Q:

What is the disadvantage of microprocessor?

Answer

1.Limitations on the size of data. 


2.Most Microprocessors does not support floating-point operations. 


3.Over heating physically


4. Not bit addressable

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Q:

A genus can best be defined as

A) a taxon composed of one or more species and a classification level lying below family B) a taxon composed of families
C) the most specific taxon D) a taxon comprised of classes
 
Answer & Explanation Answer: A) a taxon composed of one or more species and a classification level lying below family

Explanation:

A genus can best be defined as a taxon composed of one or more species and a classification level lying below family.

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Q:

Tropical evergreen rain forest biome provides optimum environmental conditions for the growth of plants and animals. Which one among the following statements regarding this is not correct?

 

A) It has heavy rainfall and high temperature throughout the year. B) This biome is also called mega-thermal biome.
C) The evergreen rain forest biome extended between 10 deg N and 10 deg S latitudes. D) The maximum development of this biome has taken place in central and southern California, and north-western coastal lands of Africa.
 
Answer & Explanation Answer: D) The maximum development of this biome has taken place in central and southern California, and north-western coastal lands of Africa.

Explanation:

Tropical rainforests are such rainforests that occur in the region of tropical rainforest climate where there is no dry season and it remain hot and wet.Tropical evergreen rainforest biome provides optimum environmental conditions for the growth of plants and animals because it experience heavy rainfall and high temperature, and extend between 10° N and 10° S latitudes. The biome Tropical rain forests are of mega thermal type because the organisms are adapted to high temperature and wet and humid condition. The maximum development of this biome has taken place in South America, lowland regions in Africa, and the islands off of Southeast Asia, Central America and parts of Australia.

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Q:

Which macronutrient is vital for every function of the body?

A) Fats B) Carbohydrates
C) Water D) Proteins
 
Answer & Explanation Answer: C) Water

Explanation:

The macronutrient water is the most essential nutrient which plays a vital role in every function of the body. Macronutrients are those nutrients that are required in excess amounts for the development and functioning of the body.

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Q:

Which is the weakest force in the universe?

Answer

Gravitational Force

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Subject: Physics

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