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Q:

The smallest blood vessels which are one-cell thick, are called ______

A) vena cava B) arteries
C) veins D) capillaries
 
Answer & Explanation Answer: D) capillaries

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Q:

___________ being a higher category, is the assemblage of families which exhibit a few similar characters.

A) Order B) Species
C) Genus D) Class
 
Answer & Explanation Answer: A) Order

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Q:

Which type of pathogen causes the water-borne disease Typhoid fever?

A) Algal B) Parasitic
C) Protozoan D) Bacterial
 
Answer & Explanation Answer: D) Bacterial

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Q:

When a chromosome undergoes a deletion mutation information is

A) Repeated B) Lost
C) Reversed D) Transferred
 
Answer & Explanation Answer: B) Lost

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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:

The hormone that helps plants respond to drought is

A) abscisic acid B) cytokinin
C) gibberellin D) ethylene  
 
Answer & Explanation Answer: A) abscisic acid

Explanation:

During drought, plants would be in scarcity for water. For ensuring the mineral loss of water through stomata, the plant starts to produce abscisic acid.

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Q:

The deficiency of Niacin­a vitamin of B complex group causes the disease _____

A) Marasmus B) Pellagra
C) Rickets D) Night­-blindness
 
Answer & Explanation Answer: B) Pellagra

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Q:

Leptospirosis is a disease caused by

A) Virus B) Fungus
C) Protozoa D) None
 
Answer & Explanation Answer: D) None

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