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 Biology Questions

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Q:

The hormone that stimulates heart beat is

A) Thyroxine B) Gastrin
C) Glycogen D) Dopamine
 
Answer & Explanation Answer: A) Thyroxine

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Q:

Companion cells are unique to

A) Bryophytes B)  Pteridophytes
C) Angiosperms D)  Gymnosperms
 
Answer & Explanation Answer: C) Angiosperms

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Q:

Lacrymal glands are situated in the

A)  Palms B) Buccal cavity
C) Buccal cavity D) Stomach
 
Answer & Explanation Answer: C) Buccal cavity

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Q:

A US team of scientists has found that the mechanism responsible for the ageing process is located --

A) Inside the face B) Inside the skin
C) Inside the brain D) Inside the heart
 
Answer & Explanation Answer: C) Inside the brain

Explanation:
The US team of scientists found the mechanism in the hypothalamus, which is located deep inside the brain and showed that it is responsible for the ageing process.
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Q:

Which is the longest bone in the human body?

A) Fibula B) Radius
C) Stapes D) Femur
 
Answer & Explanation Answer: D) Femur

Explanation:
The femur is also the longest bone in the human body. By most measures the femur is the strongest bone in the body.
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Q:

Xylem helps in transportation of which of the following?

A) Food B) Water
C) Nutrients D) Both food and water
 
Answer & Explanation Answer: B) Water

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Q:

Which of the following is a work done by the placenta tissue in humans?

A) Support the embryo B) Removes waste matter from the embryo and provide nutrition to the embryo
C) Provide nutrition to the embryo D) Remove waste matter from the embryo
 
Answer & Explanation Answer: B) Removes waste matter from the embryo and provide nutrition to the embryo

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Q:

Which tissue makes the plant hard and stiff?

A) Parenchyma B) Sclerenchyma
C) Collenchyma D) Xylem
 
Answer & Explanation Answer: B) Sclerenchyma

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