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Q:

Syngamy is defined as

A) the fission of one egg B) the fusion of one of the sperms with the synergid
C) the fission of one sperm D) the fusion of one of the sperms with the egg
 
Answer & Explanation Answer: D) the fusion of one of the sperms with the egg

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Filed Under: Biology
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Q:

The line graph shows the average hours per day spent by teenagers playing outdoor games. Study the diagram and answer the following questions.

What is the ratio of hours per day spent in playing outdoor games by 13 year olds and 18 year olds?

 

A) 1 : 5 B) 5 : 2
C) 2 : 5 D) 5 : 1
 
Answer & Explanation Answer: B) 5 : 2

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Filed Under: Line Charts
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Q:

Which leukocyte is responsible for antibody production?

A) Monocyte B) T-Cells
C) B Lymphocyte D) Basophil
 
Answer & Explanation Answer: C) B Lymphocyte

Explanation:

Leukocyte, commonly known as a white blood cell (WBC), is a major component in protecting the body against invading microorganisms and body cells with mutated DNA, and they clean up debris. 

B Lymphocyte also called as B-Cells or plasma cells produces the antibodies or immunoglobulins that bind to specific foreign or abnormal components of plasma membranes. This is also referred to as humoral (body fluid) immunity.

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Filed Under: Biology
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Q:

Narcolepsy is a disorder in which a person

A) has excessive daytime sleepiness B) has excess heart rate
C) has excess body pains D) All the above
 
Answer & Explanation Answer: A) has excessive daytime sleepiness

Explanation:

 

Narcolepsy is a disorder in which a person has excessive daytime sleepiness, sleep/wake disorder.

 

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Filed Under: Biology
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Q:

If the measure of the exterior angle of a regular polygon is 72 deg then how many sides does it have?
 

A) 6 B) 8
C) 9 D) 5
 
Answer & Explanation Answer: D) 5

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Filed Under: Volume and Surface Area
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Q:

Find the curved surface area (in cm2) of a right circular cylinder of diameter 7 cm and height 6 cm.

A) 132 B) 110
C) 92 D) 154
 
Answer & Explanation Answer: A) 132

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Filed Under: Volume and Surface Area
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Q:

What is the basic unit of classification in taxonomy?

A) Genus B) Species
C) Family D) Order
 
Answer & Explanation Answer: B) Species

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Filed Under: General Science
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Q:

A triangle is circumscribed on the circle of centre O in such a way that sides AB = 12 cm, BQ = 7 cm and CQ = 5 cm. Calculate the lengtth (in cm) of side AC.

A) 8 B) 10
C) 12 D) 14
 
Answer & Explanation Answer: B) 10

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Filed Under: Volume and Surface Area
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