Biology 40
196. The tasar silk fiber is produced by
(A) Philosomia ricini
(B) Antheraea assamensis
(C) Antheraea mylitta
(D) Bombyx mor
(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
(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
(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
(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
(A) Mn
(B) Mg
(C) C
(D) N
Correct Answer: [B] Mg.
Explanation: Formula of chlorophyll C55H72O5N4Mg
Explanation: Formula of chlorophyll C55H72O5N4Mg
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