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Q:

The rate of respiration per minute in a new born baby

A) 18 times B) 32 times
C) 26 times D) 16 times
 
Answer & Explanation Answer: B) 32 times

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Filed Under: Biology

Q:

In plants, exchange of gases takes place through

A) Stomata B) Palisade tissue
C) Spongy tissue D) mid rib
 
Answer & Explanation Answer: A) Stomata

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Filed Under: Biology

Q:

karl Landsteiner discovered

A) Blood corpuscles B) Blood groups
C) Blood vessels D) Proteins in Blood
 
Answer & Explanation Answer: B) Blood groups

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Filed Under: Biology

Q:

Total salt content in blood is about

A) 1.85 to 1.9% B) 11.85 to 11.9%
C) 2.85 to 2.9% D) 0.85 to 0.9%
 
Answer & Explanation Answer: D) 0.85 to 0.9%

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Filed Under: Biology

Q:

In electro - magnetic radiation, which of the following has greater wave - length than visible light

A) Ultra -violet rays B) Infra - red rays
C) Cosmic rays D) x-rays
 
Answer & Explanation Answer: B) Infra - red rays

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Filed Under: Biology

Q:

13 - Chambered heart occurs in

A) Leech B) Earthworm
C) Snail D) Cockroach
 
Answer & Explanation Answer: D) Cockroach

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Filed Under: Biology

Q:

One of the following cannot be performed by animals

A) Respiration B) Photosynthesis
C) Reproduction D) Digestion
 
Answer & Explanation Answer: B) Photosynthesis

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Filed Under: Biology

Q:

Name the blood cells in which nucleus is absent

A) Lymphocytes B) Blood Platelets
C) Monocytes D) Eosinophils
 
Answer & Explanation Answer: B) Blood Platelets

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Filed Under: Biology