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Q:

Which of the following classes of animals has/have three-chambered heart?

A) Pisces and Amphibia B) Amphibia and Reptilia
C) Reptilia only D) Amphibia only
 
Answer & Explanation Answer: B) Amphibia and Reptilia

Explanation:

Mammalian and avian hearts have four chambers two atria and two ventricles.Amphibians and reptiles, by contrast, have a three-chambered heart. The three-chambered heart consists of two atria and one ventricle.Fish possess the simplest type of true heart a two-chambered organ composed of one atrium and one ventricle.

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Q:

Honey that has high concentration of sugar does not decay because

A) Bacteria cannot survive in an active state as it is totally deprived of oxygen B) It contains natural antioxidant that prevents bacterial attack
C) Bacteria cannot survive in an active state in a solution of high osmotic strength as water is drawn out D) None of these
 
Answer & Explanation Answer: C) Bacteria cannot survive in an active state in a solution of high osmotic strength as water is drawn out

Explanation:
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Q:

The chemical component that is invariably found in all viruses is

A) proteins B) lipids
C) DNA D) RNA
 
Answer & Explanation Answer: A) proteins

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Q:

In females, the ovaries are located ______ on each side of the lower abdomen.

A) One B) Two
C) Three D) Four
 
Answer & Explanation Answer: A) One

Explanation:
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Q:

Name the source from which Aspirin is produced?

A) Willow bark B) Oak Tree
C) Acacia D) Eucalyptus
 
Answer & Explanation Answer: A) Willow bark

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Q:

What is the total number of bones in the human body?

A) 206 B) 103
C) 309 D) 412
 
Answer & Explanation Answer: A) 206

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Q:

How many facial bones are there?

A) 34 B) 24
C) 14 D) 4
 
Answer & Explanation Answer: C) 14

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Q:

For the aquatic organisms, the source of food is

A) Phytoplankton B) Sea Weed
C) Aqua plankton D) Zooplankton
 
Answer & Explanation Answer: A) Phytoplankton

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