Thursday, February 27, 2020

WBCS Polity and Constitution MCQs Prelims and Mains

general biology test questions and answers For UPSC | SSC | Rail | RRB | State PSC P41


Biology 41

201. Normal human blood is
(A) Acidic
(B) Alkaline
(C) Neither acidic nor basic
(D) None of this

Correct Answer: [B] Alkaline.
Explanation: pH of human blood is ranged between 7.35 - 7.45
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202. Earliest gland appeared in the human embryo is
(A) Pituitary gland
(B) Thyroid gland
(C) Thymos
(D) Hypothalamus

Correct Answer: [A] Pituitary gland.
Explanation: The earliest organ that appears in the embryo is the heart.
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203. The largest organ of the human body is
(A) Liver
(B) Skin
(C) heart
(D) Stomach

Correct Answer: [B] Skin.
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204. Dormancy of seeds is promoted by?
(A) ABA
(B) IAA
(C) Auxin
(D) Gebbrilin

Correct Answer: [A] ABA.
Explanation: Abscisic Acid(ABA) control the dormancy of seeds. It is also called anti-gibberellin hormone.
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205. Dengue is caused by Flavivirus. What is the vector of dengue fever?
(A) Aedes Mosquito
(B) Female Anopheles mosquito
(C) Male Anopheles mosquito
(D) Culex mosquito

Correct Answer: [A] Aedes Mosquito.
Explanation: Female mosquito only bite.
Dengue, yellow fever is caused by Aedes mosquito.
Malaria is caused by Anopheles mosquito.
Filariasis is caused by Culex mosquito.
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