(a) Homothallic (b) Heterothallic (c) Heterotrophic (d) Heteromorphic Ans. a (11)
(a) Brown algae (b) Sphagnum (c) Ferns (d) Cycads Ans. c (11)
Two wires A and B are of same materials. Their lengths are in the ratio 1 : 2 and diameters are in the ratio 2 : 1 when stretched by force FA and FB respectively they get equal increase in …
a. Ionic solids b. Molecular solids c. Amorphous solids d. Liquids Ans. a Explanation : Point defect arises because of movement/ deficiency/ excess of ions. (7)
a. AgBr b. AgCl c. KBr d. ZnS Ans. c Explanation : KBr exhibits Schottky defect and not Frenkl defect. (6)
a. Metal excess defect b. Metal deficiency defect c. Displacement defect d. Impurity defect Ans. b Explanation : Metal deficiency occurs when metals show variable valency (9)
a. 2 b. 1 c. 3 d. 5 Ans. d (4)
a. Disloction defect b. Schottky defect c. Frenkel defect d. Electronic defect Ans. d Explanation : When electron rich or electron deficient impurity is added to a perfect crystal it introduces electronic defect in them. (10)
a. p-type semiconductor b. n-type semiconductor c. Intrinsic semiconductor d. Insulator Ans. b (23)
a. Metallic conductor b. Insulator c. n- type semiconductor d. p-type semiconductor Ans. c Explanation : Excess of one valence electron in p atom over Si will form n-type semiconductor (7)
a. Frenkel defect b. Schottky defect c. Non-stoichiometric defect d. Simple intertitial defect Ans. a Explanation : Frankel defect is also known as dislocation defect because in Frankel defect atoms present in crystal lattice is dislocated to interstitial site. (6)
(a) Presence of vascular system (b) Absence of flowers (c) Absence of fruits (d) All the above Ans. d (11)
(a) (2Gm/r)1/2≤c (b) (2Gm/r)1/2=c (c) (2Gm/r)1/2≥c (d) (gm/r)1/2≥c Answer: c (4)
(a) Multiplies very fast to produce massive biomass (b) Has association of nitrogen-fixing Rhizobium (c) Has association of nitrogenfixing cyanobacteria (d) Has association of mycorrhiza Ans. c (6)
(a) Bacteria (b) Gymnosperm (c) Pteridophytes (d) Archaebacteria Ans. c (6)
(a) Ginkgo (b) Selaginella (c) Polypodium (d) Azolla Ans. a (9)
Two satellite are revolving around the earth with velocities v1 and v2 and in radii r1 and r2 (r1 > r2) respectively Then (a) v1 = v2 …
The area of cross section of a steel wire (Y=2.0×1011 N/m2) is 0.1 cm2 . The force required to double its length will be (a) 2×1012 N/m …
(a) Azolla (b) Salvinia (c) Marsilia (d) Pteridium Ans. a (11)
(a) Apospory (b) Apogamy (c) Apomictic (d) Apomixis Ans. a (9)
(a) Byophyte (b) Pteridophyte (c) Gymnosperm (d) Angiosperm Ans. b (5)
(a) Length of the wire (b) Radius of the wire (c) Material of the wire (d) Shape of the cross section Answer-c (13)
(a) Azolla (b) Salvinia (c) Pteris (d) Both (a) and (b) Ans. d (5)
(a) Lycopodium (b) Lygodium (c) Psilotum (d) Rhynia Ans. d (5)
(a) Solenostele (b) Protostele (c) Dictyostele (d) Siphonostele Ans. b (12)
(a) Square of the distance of the milky way from the earth (b) Distance of milky way from the earth (c) Mass of the milky way (d) Product of the mass of the milky way and its distance from the …
(a) Psilophytales (b) Lycopods (c) Horse-tail (d) Cycas Ans. a (14)
(a) Gametophyte of fern (b) Sporophyte of angiosperm (c) Sporophyte of gymnosperm (d) Sporophyte of fern Ans. a (6)
If orbital velocity of planet is given by v =Ga Mb Rc , then (a) a=1/3,b=1/3,c=-1/3 (b) a=1/2,b=1/2,c=-1/2 (c) a=1/2,b=-1/2,c=-1/2 (d) a=1/2,b=-1/2,c=-1/2 Answer: b (8)
(a) Gametophyte (b) Sporophyte (c) Sporangium (d) Prothallus Ans. b (10)
(a) Haploid (b) Diploid (c) Triploid (d) Tetraploid Ans. a (6)
(a) Homospory (b) Homothallism (c) Heterospory (d) Apospory Ans. c (8)
(a) Sporangiophore (b) Sorus (c) Sporangium (d) Strobilus or cone Ans. d (43)
(a) Monoecious gametophytes (b) Dioecious gametophytes (c) Homothallic gametophytes (d) None of the above Ans. b (8)
(a) 4π2 R3 G-1T-2 (b) 8π2 R3 G-1T-2 (c) 12π2 R3 G-1T-2 (d) 16π2 R3 G-1T-2 Answer: a (10)
(a) Haploid (b) Gametophytic (c) Diploid (d) Triploid Ans. c (10)
(a) 2.507 (b) 1.033 (c) 8.324 (d) 1.000 Answer: b (7)
(a) Heterospory (b) Seed bearing (c) Homospory (d) Tracheids and vessels Ans. c (6)
(a) Sporophyte is parasitic over gametophyte (b) Gametophyte is parasitic over sporophyte (c) Sporophyte is independent of gametophyte (d) Sporophyte is semiparasite Ans. a (5)