11. In plants, the receptor for detecting photoperiod is
(A) Protein molecule
(B) Gradient of K+
(C) Sensory cell
(D) Sensory organelles.
Correct Answer: [A] Protein molecule.
12. Which one of the following is a protozoan?
(A) Yeast
(B) Variola
(C) Pea mosaic
(D) Entamoeba Hystolytica.
Correct Answer: [D] Entamoeba Hystolytica..
13. Which one is not a protozoan?
(A) Amoeba
(B) Paramoec
(C) Hydra
(D) Euglena.
Correct Answer: [C] Hydra.
14. The smallest size of a cell which can be seen with the unaided eye is
(A) 100 microns
(B) 1000 microns
(C) One micron
(D) 10 microns.
Correct Answer: [A] 100 microns.
15. According to Darwin, the unit of Natural Selection is
(A) Gene
(B) Species
(C) Individual
(D) Family.
Correct Answer: [B] Species.
16. AIDS is caused by
(A) Protozoa
(B) Helminth
(C) Bacteria
(D) Virus.
Correct Answer: [D] Virus..
17. The first hormone produced by Genetic Engineering is
(A) Thyroxin
(B) Insulin
(C) Estrogen
(D) Testosterone.
Correct Answer: [B] Insulin.
18. Name of an insectivorous plant
(A) Basak
(B) Pitcher plant
(C) Gulancha
(D) Nayantara.
Correct Answer: [B] Pitcher plant.
19. Carcinoma is cancer originating from
(A) Muscular tissue
(B) Nerve tissue
(C) Epithelial tissue
(D) Connective tissue.
Correct Answer: [C] Epithelial tissue.
20. Green vegetables are a good source of
(A) Minerals
(B) Carbohydrates
(C) Vit-A
(D) Vit-C.
Correct Answer: [A] Minerals.
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