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Q:

In a majority of flowering plants, out of the four megaspores, what is the ratio of functional and degenerate megaspores?

A) 2:2 B) 1:3
C) 3:1 D) 4:0
 
Answer & Explanation Answer: B) 1:3

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Q:

The largest artery in human body is

A) Aorta B) Capillary
C) Vena cava D) Pulmonary vein
 
Answer & Explanation Answer: A) Aorta

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Q:

__________ are made up of sclerenchymatous cells. These are generally absent in the primary phloem but are found in the secondary phloem.

A) Xylem fibres B) Xylem parenchyma
C) Phloem parenchyma D) Phloem fibres
 
Answer & Explanation Answer: D) Phloem fibres

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Q:

Fishes have a ........ chambered heart.

A) Single B) Three
C) Four D) Two
 
Answer & Explanation Answer: D) Two

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Q:

Which of the following disease is caused by female Anopheles mosquito?

A) Chicken Pox B) Malaria
C) Black Fever D) Cholera
 
Answer & Explanation Answer: C) Black Fever

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Q:

In Animal Kingdom classification, which of the following is not a Phylum?

A) Mollusca B) Chordata
C) Coelomates D) Anneldia
 
Answer & Explanation Answer: C) Coelomates

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Q:

Which one of the following statements regarding haemoglobin is correct?

A) Haemoglobin present in RBC can carry only oxygen but not carbon dioxide B) Haemoglobin of RBC can carry both oxygen and carbon dioxide
C) Haemoglobin of RBC can carry only carbon dioxide D) Haemoglobin is only used for blood clotting and not for carrying gases.
 
Answer & Explanation Answer: B) Haemoglobin of RBC can carry both oxygen and carbon dioxide

Explanation:

During respiration, about 97% of oxygen is transported by Red Blood Cells in blood and the remaining 3% gets dissolved in the plasma.Around 20-25% of carbon dioxide is carried by haemoglobin as carbamino-haemoglobin.

Oxygen enters the blood from the lungs and carbon dioxide is expelled out of the blood into the lungs. The blood serves to transport both gases. Oxygen is carried to the cells. Carbon dioxide is carried away from the cells.

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Q:

Which of the following is induced by Oncogene?

A) Polio B) Cancer
C) Diarrhoea D) Dengue
 
Answer & Explanation Answer: B) Cancer

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