(a) Operculum (b) Annulus (c) Stomium (d) Ostiole Ans. c (9)
(a) Biconvex (b) Circular (c) Biconcave (d) Plano-convex Ans. a (7)
(a) Spherical (b) Coiled (c) Multiflagellate (d) All of the above Ans. c (4)
(a) Heart-shaped (b) Dorsiventral (c) Green (d) All of the above Ans. d (9)
(a) Margin of leaf (b) Abaxial side of leaf (c) Adaxial side of leaf (d) Only on the tip of leaf Ans. a (7)
(a) Sporangiophore (b) Annulus (c) Stomium (d) Indusium Ans. b (8)
(a) Hadrocentric (b) Leptocentric (c) Radial (d) Conjoint collateral Ans. a (10)
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(a) Sporangium (b) Oogonium (c) Archegonium (d) Stomium Ans. a (24)
(a) Sporophyll (b) Sorus (c) Cone (d) Ramenta Ans. b (14)
(a) Parallel (b) Reticulate (c) Dichotomous (d) Open furcate Ans. d (18)
The magnitudes of the gravitational force at distances r1 and r2 from the centre of a uniform sphere of radius R and mass M are F1 and F2 respectively. Then Answer: A (12)
(a) Apospory (b) Parthenogenesis (c) Parthenocarpy (d) Apogamy Ans. d (5)
(a) Cycas stem (b) Pinus needle (c) Fern leaf (d) Fern rhizome Ans. d (15)
(a) Possess a single layer of wall cells (b) Produce very few spores (c) Originate from a group of initial cells (d) Dehiscence at the region of a well defined stomium Ans. c (11)
Imagine a light planet revolving around a very massive star in a circular orbit of radius R with a period of revolution T. If the gravitational force of attraction between planet and star is proportional R-(5/2)to , then T2 is proportional …
(a) Sporophytic stage (b) Gametophytic stage (c) Sporophytic and gametophytic stage (d) Apomictic stage Ans. b (18)
(a) Dictyostele (b) Siphonostele (c) Protostele (d) None of these Ans. a (5)
(a) Pollen tube (b) Water (c) Archegonia (d) Flagellated sperms Ans. a (11)
(a) Rhizome (b) Indusium (c) Sori (d) Ramenta Ans. d (9)
(a) 1/x (b) 1/x2 (c) x (d) x2 Answer-c (7)
(a) Ramentum (b) Sorus (c) Indusium (d) Sporophyll/Frond Ans. d (12)
A rubber cord catapult has cross-sectional area 25mm2 and initial length of rubber cord is It is stretched to and then released to project a missile of mass (Taking YRUBBER=5×108N/m2) velocity of projected missile is (a) 20 m/s …
(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)