Questions

Q:

Which statement regarding the mammalian heart is correct?

A) Blood is pumped from the heart via the atria. B) Oxygen-loaded blood moves only through the right side of the heart.
C) When the right atrium contracts, it forces blood into the left atrium. D) In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs.
 
Answer & Explanation Answer: D) In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs.

Explanation:

In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs is correct regarding mammalian heart.

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Q:

Which statement describes decomposers?

A) Decomposers are insignificant organisms in the ecosystem and can be absent in some ecosystems. B) Decomposers can produce their own source of energy and can sometimes act as primary producers.
C) Decomposers are those organisms that recycle matter in the ecosystem.. D) All the above
 
Answer & Explanation Answer: C) Decomposers are those organisms that recycle matter in the ecosystem..

Explanation:

Decomposers are organisms that break down dead or decaying organisms, and in doing so, they carry out the natural process of decomposition.

 

The statement "Decomposers are those organisms that recycle matter in the ecosystem" describes decomposers.

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Q:

Antisnake venom is prepared by 

A) Pasteur institute B) Hoffkine's institute
C) Birla's Institute D) Indian science Institute
 
Answer & Explanation Answer: B) Hoffkine's institute

Explanation:

Antisnake venom: In the Hoffkine Institute at Bombay snake venom in mild dose is injected into horses and the horses are induced to produce anti-venom bodies. These are extracted and used in cases of snake bites.

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Q:

The average weight of a blue whale is

Answer

1,20,000 kg.

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Q:

What are the three parts of the Nucleotide?

Answer

Nucleotides are the building blocks of the DNA and RNA used as genetic material. Nucleotides also are used for cell signaling and to transport energy throughout cells.


Both deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are made up of nucleotides which consist of three parts::


1. Nitrogenous Base
2. Pentose Sugar
3. Phosphate Group.

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Q:

The amount of water vapor in the air is

A) Hot air B) Humidity
C) Dew D) Foam
 
Answer & Explanation Answer: B) Humidity

Explanation:

The amount of water vapor ranges from a trace amount up to 4% of the mass of air. Water vapor exists as an invisible gas in the air.

 

The amount of water vapor in the air is called absolute humidity. The amount of water vapor in the air as compared with the amount of water that the air could hold is called relative humidity.

The maximum amount of water vapor that can be in the air depends on the air temperature.

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Q:

Melvin calvin got Noble Prize for his studies on

A) Light reaction B) Plant hormones
C) Carbon fixation D) Photons
 
Answer & Explanation Answer: C) Carbon fixation

Explanation:
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Q:

A myocardial infarction is a heart attack.

A) TRUE B) FALSE
Answer & Explanation Answer: A) TRUE

Explanation:

True, the given statement that a myocardial infarction is a heart attack.


heart-attack-_myocardial_infarction1532070967.jpg image

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