Thursday, February 27, 2020

WBCS Polity and Constitution MCQs Prelims and Mains

biology questions quizlet For UPSC | SSC | Rail | RRB | State PSC P40

Biology 40

196. The tasar silk fiber is produced by
(A) Philosomia ricini
(B) Antheraea assamensis
(C) Antheraea mylitta
(D) Bombyx mor

Correct Answer: [C] Antheraea mylitta.
197. Which of the following can indicates the air pollution of an area?
(A) Bacteria
(B) Algae
(C) Fungus
(D) Mosses

Correct Answer: [D] Mosses.
198. Which is not true for bio-fertilizer?
(A) Release nitrogen more slowly
(B) Does not badly affect the pH of the soil.
(C) More efficient than chemical fertilizer
(D) It is eco-friendly

Correct Answer: [C] More efficient than chemical fertilizer.
199. Which of the following isotope is used for the treatment of thyroid?
(A) I-313
(B) Co-60
(C) P-32
(D) C-14

Correct Answer: [A] I-313.
200. The metallic component of chlorophyll
(A) Mn
(B) Mg
(C) C
(D) N

Correct Answer: [B] Mg.
Explanation: Formula of chlorophyll C55H72O5N4Mg


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