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Q:

Plants that make their own food are called

A) Autotrophs	B) Hydrophylls
C) Decomposers	D) Heterotrophs

Answer & Explanation Answer: A) Autotrophs

Explanation:

Plants make their own food through the process of photosynthesis. Plants are self-sufficient. Green plants have the ability to prepare their own food and this is the reason why they are called autotrophs.

Autotrophs1530267836.jpg image

They make their own food through the process of photosynthesis using light energy to make sugars from carbon dioxide (C02) and water (H20). The chlorophyll which is present in the leaves is the main reason for the production of food in the plants and it is the reason for the greenery of the leaves too.

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Q:

What two countries have nearly 50% of global coal reserves?

A) Iran & USA	B) USA & China
C) Russia & USA	D) Brazil & Russia

Answer & Explanation Answer: C) Russia & USA

Explanation:

United States and Russia have together almost 400 billion tones. Which represents nearly 50% of world's reserves of coal.

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Filed Under: World Geography
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Q:

25 : 37 :: 49 : ?

A) 65	B) 69
C) 79	D) 81

Answer & Explanation Answer: A) 65

Explanation:

Here the given numbers are related in such a manner that,

$5^{2} = 25 {(5 + 1)}^{2} + 1 = 37 Similarly, 7^{2} = 49 {(7 + 1)}^{2} + 1 = 64 + 1 = 65$

Hence, 25 : 37 :: 49 : 65.

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Filed Under: Analogy
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Q:

The main result of aerobic respiration is the

A) production of lactic acid as an end product	B) production of ATP from the breakdown of glucose
C) conversion of radiant energy into chemical energy	D) storage of energy in a polysaccharide

Answer & Explanation Answer: B) production of ATP from the breakdown of glucose

Explanation:

The three steps within the aerobic respiration process are glycolysis, the citric acid cycle, and oxidative phosphorylation.

Photosynthesis builds glucose, and what was built in photosynthesis is broken down during aerobic respiration.

Hence, production of ATP from the breakdown of glucose is the main result of aerobic respiration.

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Q:

Plant cell walls consist mainly of

A) Chitin	B) peptidoglycan
C) cellulose	D) chlorophyll

Answer & Explanation Answer: C) cellulose

Explanation:

Plant cell walls are mostly made up of the molecule cellulose. Cellulose is a polysaccharide, a complex sugar made of long chains of glucose.

The cell wall must be made of thick and strong material as it provides the structural shape of the plant and protection from insects and microorganisms.

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Q:

What goes up and down the stairs without moving?

A) Umbrella	B) Lift
C) Stairs	D) All the above

Answer & Explanation Answer: C) Stairs

Explanation:

Those are stairs which goes up and down without moving.

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Q:

What is the missing number in 5, 14, 42, 107, 233, ?

A) 316	B) 384
C) 450	D) 479

Answer & Explanation Answer: C) 450

Explanation:

Given Series is 5, 14, 42, 107, 233, _?

5, 14, 42, 107, 233, _?

Differences is 9, 28, 65, 126

9 = 2^3 + 1

28 = 3^3 + 1

65 = 4^3 + 1

126 = 5^3 + 1

Now, next difference must be 6^3 + 1 = 217

Hence, next number in the given series = 233 + 217 = 450.

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Q:

What place is designated as 0 degrees longitude?

A) Greenwich	B) Prime meridian
C) Tibet	D) Norway

Answer & Explanation Answer: A) Greenwich

Explanation:

The place which is designated as 0 degrees longitude is Greenwich, England.

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Filed Under: World Geography
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