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 Biology Questions

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Q:

Which observation proves that a cell is a eukaryote?

A) It contains DNA B) It contains ribosomes
C) It has a cell membrane D) It has DNA inside a nucleus
 
Answer & Explanation Answer: D) It has DNA inside a nucleus

Explanation:

Eukaryotic cells all have a nucleus. Eukaryotes are organisms that are multicellular, although there are some examples of single cellular eukaryotes. So eukaryotic cells can be either cell with a nucleus or a eukaryotic organism's cell.

The most important feature to judge whether it has nucleus membrane.

And for other choices, they are the common features of eukaryote and prokaryote.

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Q:

The water readily available to plants for absorption by roots is

A) Gravitational water B) Rain water
C) Hygroscopic water D) Capillary water
 
Answer & Explanation Answer: D) Capillary water

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:

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:

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:

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:

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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