What regulates the flow of water through the xylem...? Mcqs

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What regulates the flow of water through the xylem...?

(A) Passive transport by the endodermis
(B) The number of companion cells in the phloem

(C) The evaporation of water from the leaves
(D) Active transport by sieve-tube membrane

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Approximate age of earth is ________...?

(A) 4.14 billion years
(B) 4.64 billion years

(C) 4.54 billion years
(D) 4.34 billion years

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A normal platelets count range ...?

(A) 1.5 lac  – 4.5 lac platelets per liter blood.
(B) 1.5 lac – 4.5 lac platelets per micro-liter of blood.

(C) 1.5 million  – 4.5 million platelets per liter of blood.
(D) 1.5 million  – 4.5 million platelets per micro-liter of blood.

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The study of cancer is called_____________...?

(A) Zoology
(B) Ecology

(C) Genomic
(D) Oncology

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Halley’s Comet is the only known short-period comet that is consistently visible to the naked eye from Earth, appearing every 72–80 years. It last appeared in the inner parts of the Solar System in 1986 and will next appear in mid-_________...?

(A) 2065
(B) 2061

(C) 2040
(D) None of These

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Which mineral is the present in whole wheat, bananas, peas, prunes, oysters, liver, kidney, grains and legumes...?

(A) Copper
(B) Magnesium

(C) Sodium
(D) Iron

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The biggest species of the cat family is___________...?

(A) Tiger
(B) Lion

(C) Leopard
(D) None

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The major ingredient of leather is__________________...?

(A) Collagen
(B) Polymer

(C) Nucleic acid
(D) None of these

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The soil maturity color of northeastern areas is ______...?

(A) Grey
(B) Reddish

(C) Dark Brown
(D) None of these

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A type of circulatory system blood flow through the spaces among tissues called...?

(A) Open type circulatory system
(B) Close type circulatory system

(C) Pulmonary circulatory system
(D) All of these

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