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Q:

Which of these is true of all simple machines?

A) these make work easier	B) work input > work output
C) Both A & B	D) None of the above

Answer & Explanation Answer: C) Both A & B

Explanation:

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Filed Under: Physics
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Q:

Which company was a monopoly during the gilded age?

A) Carnegie Steel	B) Microsoft
C) Allegheny Steel	D) AT&T

Answer & Explanation Answer: A) Carnegie Steel

Explanation:

Monopoly is an economic term that describes a single company or entity controlling one hundred percent of the supply of a particular product. Carnegie Steel is one of the argest monopoly of steel industry during the Gilded age.

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Filed Under: Indian History
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Q:

Which of the following is an example of secondary succession?

A) sedimentation on the bottom of drained lake	B) landscaping at a golf course
C) reforestation of the cedar forests of the northwest	D) scrub grasses growing on a newly exposed dune

Answer & Explanation Answer: C) reforestation of the cedar forests of the northwest

Explanation:

Secondary succession means in an ecosystem renewal of itself after all or a portion has been destroyed.

After a forest fire, the whole forest had destroyed but after that again renewal of that forest is also an example of secondary succession.

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Filed Under: General Science
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Q:

The galapagos finches are an excellent example of

A) Speciation	B) Isolation
C) Mating	D) None of the above

Answer & Explanation Answer: A) Speciation

Explanation:

The galapagos finches are an excellent example of speciation which means the formation of distinct species in the course of evolution.

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Filed Under: Animals and Birds
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Q:

Which plant cell organelle contains its own dna and ribosomes?

A) mitochondria	B) Chloroplasts
C) Both A & B	D) Vacuole

Answer & Explanation Answer: C) Both A & B

Explanation:

The plant cell organelles, "The power house of the cell" mitochondria and the chloroplasts contains their own DNA and ribosomes.

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Filed Under: Biology
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Q:

Which of the following reactions are exothermic?

$1) C + O_{2} \to {CO}_{2} 2) 2 Mg + O_{2} \to 2 MgO 3) {CuSO}_{4} + 5 H_{2} O \to {CuSO}_{4} . 5 H_{2} O 4) All the above$

A) 1	B) 2
C) 3	D) 4

Answer & Explanation Answer: D) 4

Explanation:

Here all the given options are Exothermic reactions. Exothermic reactions are those reactions which involves the release of heat.

Generally all the combining reactions are exothermic in nature.

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Filed Under: Chemistry
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Q:

What stays where it is when it goes off?

A) An Alarm	B) A T.V
C) A light switch	D) All of the above

Answer & Explanation Answer: D) All of the above

Explanation:

All the above will stay where they are when they goes off. Basically anything that can swithch on or off will come under this.

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Filed Under: Logic Puzzles
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Q:

For economists, the word "utility" means

A) pleasure and satisfaction	B) purposefulness
C) versatility and flexibility	D) rationality

Answer & Explanation Answer: A) pleasure and satisfaction

Explanation:

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Filed Under: Indian Economy
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