51
Q:

Damage to hearing is caused by sounds which exceed

A) 70 decibels B) 80 decibels
C) 100 decibels D) 120 decibels

Answer:   D) 120 decibels



Explanation:

High frequency sound attacks the tympanic memberance and makes it defective. 120 decibels is too high a pitch to be heard and therefore it impairs the hearing ability.

Subject: Biology
Q:

Which of the following_ statements is true?

 

 

A) Carbon dioxide diffuses from lungs into blood and oxygen diffuses from blood into lungs. B) Carbon monoxide diffuses from lungs into blood and oxygen diffuses from blood into lungs.
C) Oxygen diffuses from lungs into blood and carbon dioxide diffuses from blood into lungs. D) Oxygen diffuses from lungs into blood and carbon monoxide diffuses from blood into lungs.
 
Answer & Explanation Answer: C) Oxygen diffuses from lungs into blood and carbon dioxide diffuses from blood into lungs.

Explanation:
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0 69
Q:

The organs that have different basic structure (or different basic design) but have similar appearance and perform 5 similar functions are called:

 

A) biogenetic law B) analogous organs
C) homologous organs D) fossils
 
Answer & Explanation Answer: B) analogous organs

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0 37
Q:

The reproductive parts of angiosperms are located in the:

 

A) leaves B) flowers
C) roots D) stems
 
Answer & Explanation Answer: B) flowers

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0 61
Q:

Fibers are absent in:

 

 

A) Liver B) Blood
C) Kidney D) Heart
 
Answer & Explanation Answer: B) Blood

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0 81
Q:

Which of the following is caused by a virus named 'Varicella zoster'?

 

A) Chickenpox   B) Polio  
C) Cholera   D) Rabies  
 
Answer & Explanation Answer: A) Chickenpox  

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0 85
Q:

Who discovered cells in the human body?

 

A) Charles Darwin   B) Robert Hooke  
C) Herbert Spencer   D) Albert Einstein  
 
Answer & Explanation Answer: B) Robert Hooke  

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0 48
Q:

Which of the following can be diagnosed with the Widal test?

 

A) Typhoid fever   B) Tuberculosis  
C) Cancer   D) AIDS  
 
Answer & Explanation Answer: A) Typhoid fever  

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0 49
Q:

Which of the following is the primary sex organ in females?

 

A) Uterus B) Fallopian tube
C) Ovary D) Vagina
 
Answer & Explanation Answer: C) Ovary

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0 95