Biology Questions

Q:

One reason the skeletal system is important is because

A) the skeletal system creates the connective tissue and tendons that allow the body to move B) the skeletal system is responsible for controlling functions of the entire body
C) without the skeletal system, an individual would not have enough calcium to live D) the skeletal system is solely responsible for housing the body's immune system
 
Answer & Explanation Answer: A) the skeletal system creates the connective tissue and tendons that allow the body to move

Explanation:

One reason the skeletal system is important is because the skeletal system creates the connective tissue and tendons that allow the body to move.

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Q:

Light compensation zone refers to

A) where light is available in plenty B) where light is maximum
C) beyond which light does not penetrate D) where all light is used
 
Answer & Explanation Answer: C) beyond which light does not penetrate

Explanation:
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Q:

Which best describes transformation in bacteria?

A) Bacteria take DNA from their environment. B) Bacteria inject DNA into another cell.
C) Bacteria lie dormant for many weeks. D) Bacteria transfer DNA with a bacteriophage.
 
Answer & Explanation Answer: A) Bacteria take DNA from their environment.

Explanation:

"Bacteria take DNA from their environment" is what best describes transformation in bacteria.

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Q:

The weight of the brain in the total weight of the body is about

A) 2% B) 3%
C) 4% D) 5%
 
Answer & Explanation Answer: A) 2%

Explanation:
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Q:

Palaeobotany is the branch of botany is which we study about

A) Animal fosills B) Plant fossils
C) Seed of plant D) Flower
 
Answer & Explanation Answer: B) Plant fossils

Explanation:
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Q:

Cancer is caused by

A) Loss of immunity of cells B) Uncontrolled meiosis
C) Uncontrolled mitosis D) Rupturing of cells
 
Answer & Explanation Answer: C) Uncontrolled mitosis

Explanation:
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Q:

The story of vitamins dates back to

A) 15th century B) 16th century
C) 17th century D) 18th century
 
Answer & Explanation Answer: D) 18th century

Explanation:
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Q:

To what kingdom do common bacteria belong

A) Archaea B) Protista
C) Eubacteria D) All the above
 
Answer & Explanation Answer: C) Eubacteria

Explanation:

There are two kingdoms of bacteria. They are

1. Eubacteria  and 

2. Archaea

 

The members of these two kingdoms appear similar in shape and appearance, even under the extreme magnification of the electron microscope . However, they are very different from each other in a number of molecular and biochemical aspects. It is these differences that have resulted in the microorganisms being grouped into separate kingdoms.

 

For example, eubacteria contain the rigid, stress-bearing network known as the peptidoglycan . The only exceptions are the bacteria from the genera Mycoplasma and Chlamydia. Archaebacteria do not contain peptidoglycan. Instead, they contain a different structure that is called pseudomurein.

 

The common bacteria belongs to Eubacteria kingdom.

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