CYCAS- ASSIGNMENT

1	The species of Cycas that grows naturally on Tirumala Hills is C. beddomii C. circinalis C. pectinata C. rumphii Ans:C. beddomii
2	Choose the correct statement Number of species in Cycas is more than the number of species of Rhizopus Only 4 species of Cycas occur naturally in Peninsular India Cycas pectinata is not seen in southern India Cycas rumphii is not natural inhabitant of Eastern ghats Ans:Cycas rumphii is not natural inhabitant of Eastern ghats
3	Cycas rovoluta is a Indian species Chinese species Japanese species Australian species Ans:Japanese species
4	[A]: Cycas shows habitual heterophylly [R]: Stem of Cycas is Caudex Both A and R are true and R is the correct explanation of A Both A and R are true but R is not the correct explanation of A A is true but R is false A is false but R is true Ans:Both A and R are true but R is not the correct explanation of A
5	Leaves of Cycas are Unipinnate, Paripinnate Bipinnate, Paripinnate Unipinnate, Imparipinnate Simple, Pinnately lobed Ans:Unipinnate, Paripinnate
6	Choose the correct statements I. Scale leaves of Cycas show fern character II. Scale leaves of Cycas outnumber of Foliage leaves III. Scale leaves show circinate vernation IV. Scale leaves are spirally borne on the stem All except I All except II All except IV All except III Ans:All except III
7	Dimorphic structures of Cycas are I. Leaves II. Leaflets III. Roots I, II II, III I, III I, II, III Ans:I, II, III
8	Leaflets of Cycas do not have Vein lateral veins Spine Acute tip Ans:lateral veins
9	Match the following with respect to Cycas A - III, B - IV, C - I, D - II A -III, B - IV, C - I, D - V A - IV, B - III, C - II, D - I A - III, B - V, C - I, D - II Ans:A - III, B - IV, C - I, D - II
10	Fern character of Cycas foliage leaf is Sessile leaflets Lanceolate leaflets Pinnate compound leaf Circinate vernation of leaflets Ans:Circinate vernation of leaflets
11	Dichotomously branched structures of Cycas are Veins Normal roots Leaflets Coralloid roots Ans:Coralloid roots
12	Structures of Cycas that help in gaseous exchange I. Foliage Leaves II. Normal roots III. Coralloid roots IV. Scale leaves I and II I and IV I and III I, II, III Ans:I and III
13	Apogeotropic growth is shown by I. Coralloid roots II. Stem III. Normal roots IV. Tap root I and II I, II, III I, II, III, IV I, II, IV Ans:I and II
14	Choose the correct statement with respect to Cycas Coralloid roots have root hairs Coralloid roots show both stelar and extrastelar secondary growth Coralloid roots have collateral vascular bundles Pericycle of corallod root is not single layered Ans:Pericycle of corallod root is not single layered
15	The following portion of coralloid root has highly disorganized tissue Periderm Stele Middle cortex Outer cortex Ans:Middle cortex
16	The number of vascular bundles seen in the corallod root of Cycas is equal to the number of vascular bundles seen in the roots of Plant with tendrillar leaflets Plant with loculicidal capsule Plant with Septifragal capsule Plant with spikelets Ans:Plant with tendrillar leaflets
17	[A]: Coralloid roots help in exchange of gasses [R]: They have lenticels Both A and R are true and R is the correct explanation of A Both A and R are true but R is not the correct explanation of A A is true but R is false A is false but R is true Ans:Both A and R are true and R is the correct explanation of A
18	Druses are present in A. Epidermis of Cycas leaflet B. Non-green ground tissue of Cycas leaflet C. Middle cortex of Cycas corallod roots D. Inner cortex of Cycas coralloid roots B, D A, B C, D A, C Ans:B, D
19	Arrange the following structures of Cycas leaf let from adaxial side to abaxial side. I. Phloem II. Metaxylem of Centripetal xylem III. Metaxylem of Centrifugal xylem IV. Protoxylem of Centrifugal xylem I, III, IV, II II, III, IV, I II, IV, III, I IV, II, III, I Ans:II, IV, III, I
20	Cells of transfusion tissue have Simple pits Perforation plates Bordered pits Overlapped on each other at their ends Ans:Bordered pits
21	In Anatomy, leaflets of Cycas show resemblance with leaf of Monocots in having Continuous sclerenchymatous hypodermis Only one vascular bundle Cambium in the vascular bundle Sclerenchymatous bundle sheath Ans:Sclerenchymatous bundle sheath
22	Match the following with respect to Cycas A - III, B - II, C - IV, D - I A - II, B - III, C - IV, D - I A - III, B - II, C - I, D - IV A - II, B - III, C - I, D -IV Ans:A - III, B - II, C - IV, D - I
23	Chooose the correct combinations with respect to Cycas leaflet. I and II II and III II and IV IV and III Ans:II and IV
24	[A]: Secondary transfusion helps in conduction of minerals and water [R]: It has tracheids. Both A and R are true and R is the correct explanation of A Both A and R are true but R is not the correct explanation of A A is true but R is false A is false but R is true Ans:A is true but R is false
25	Total number of Xylem groups in the Cycas leaflet vascular bundle is 4 1 2 3 Ans:3
26	The following tissue of Cycas leaflet forms axial system as well as radial or lateral system. xylem Phloem Bundle sheath Transfusion tissue Ans:Transfusion tissue
27	In the mode of vegetative reproduction, Cycas shows more resemblance with Agave Dioscorea Oxalis Globba Ans:Dioscorea
28	Cycas is Dioecious, Homosporous Monoecious, Heterosporous Dioecious, Heterosporous Synoecious, Heterosporous Ans:Dioecious, Heterosporous
29	[A]: Male plant of Cycas shows sympodial growth [R]: Axis of the Cycas male plant is formed by the stem as well as successive single branches Both A and R are true and R is the correct explanation of A Both A and R are true but R is not the correct explanation of A A is true but R is false A is false but R is true Ans:Both A and R are true and R is the correct explanation of A
30	Fern characters shown by microsporophyll of Cycas is/are I. Sori are covered by indusial hairs II. Formation of microsporangia as sori on abaxial side III. Presence of Apophysis IV. Triangular shape I and III only I II and IV I and II Ans:I and II
31	Choose the incorrect pair with respect to Cycas Microsporangium - Eusporangiate Male flower – Spiral symmetry Exothecium – Thickened tangential and radial walls Microsporangial wall – 5-6 layered wall Ans:Exothecium – Thickened tangential and radial walls
32	Indusial hairs of Cycas microsporophyll are Multicellular, multiseriate Multicellular, multiseriate 1 or 2 celled 4 celled Ans:1 or 2 celled
33	Cycas coralloid roots exhibit the following condition Triarch Diarch Tetrarch Pentarch Ans:Triarch
34	[A]: Bulbils of Cycas are adventitious buds [R]: Vegetatively propagating structures of Cycas are formed on woody portions of Cycas stem Both A and R are true and R is the correct explanation of A Both A and R are true but R is not the correct explanation of A A is true but R is false A is false but R is true Ans:Both A and R are true and R is the correct explanation of A
35	Choose the correct statement Male plant of Cycas shows monopodial growth during its 12th year of development Microsporangia of Cycas are present at the lateral side of sporophyll Coralloid roots of Cycas have 2-3 layered pericycle Leaflet of Cycas does not show lateral conduction Ans:Coralloid roots of Cycas have 2-3 layered pericycle
36	Megasporophyll of Cycas is shaped as I. Pinnate II. Ovat-lanceolate III. Rhomboidal IV. Triangular All Only I II and III All except IV Ans:All except IV
37	Choose the correct statement with respect to Cycas Young Megasporophyll of Cycas is totally covered by Ramenta Megasporophyll of Cycas is cylindrical dorsiventral structures. Each megasporophyll of Cycas has 7 pairs of Ovules Female plant shows sympodial growth. Ans:Young Megasporophyll of Cycas is totally covered by Ramenta
38	Cycas ovule size is 6 X 4 cm 6 X 6 cm 4 X 4 cm 8 X 6 cm Ans:6 X 4 cm
39	In the number of integuments, the ovules of Cycas can be compared with the ovules of Polypetalae Gamopetalae Monocots Fabaceae Ans:Gamopetalae
40	Vascularised structures of Cycas ovule are I. Outer Sarcotesta II. Nucellus III. Endosperm IV. Inner Sarcotesta I, II, III II, III, IV I, III, IV I, II, IV Ans:I, II, IV
41	Archesporial cell of Cycas female plant produces Megasporophyll Ovule Complete Nucellus Megaspore mother cell Ans:Megaspore mother cell
42	Free nuclear divisions occur during the following event in Cycas Megasporogenesis Microsporogenesis Endosperm formation Archogoniogenesis Ans:Endosperm formation
43	[A]: Pollen chamber of Cycas ovule is a Lysigenous cavity [R]: Pollen chamber is formed by the lysis of integument. Both A and R are true and R is the correct explanation of A Both A and R are true but R is not the correct explanation of A A is true but R is false A is false but R is true Ans:A is true but R is false
44	The maximum number of archegonia seen in a megasporophyll with minimum number of ovules is 96 24 16 48 Ans:16
45	Pollination drop consists of substance formed by the degeneration of cells of Archogonia female gametophyte Nucellus Integument Ans:Nucellus
46	In degree of Curvature of Ovule body on the Funiculus, ovules of Cycas can be compared with the ovules of Brassica Polygonum Alisma Primula Ans:Polygonum
47	Choose the incorrect statement Pollination in Cycas is direct and Anemophilous Archegonial chamber of Cycas is formed by the lysis of Nucellus cells Every ovule of Cycas has only one egg Each arechegonium of Cycas has two neck cells Ans:Every ovule of Cycas has only one egg
48	[A]: Endosperm of Cycas is haploid [R]: It is formed by Megaspore mother cell Both A and R are true and R is the correct explanation of A Both A and R are true but R is not the correct explanation of A A is true but R is false A is false but R is true Ans:A is true but R is false
49	In the totally developed male gametophyte of Cycas one can not observe I. Generative cell II. Tube cell III. Body cell IV. Prothallial cell I and II III and IV II and IV I and III Ans:I and III
50	Arrange the following cells of Cycas male gametophyte in sequence of older generation to younger generation of cells. I. Generative cell II. Tube cell III. Male gamete IV. Antheridial cell IV, II, I, III IV, II, III, I IV, I, II, III II, IV, I, III Ans:IV, II, I, III
51	Identify the pairs of cells formed simultaneously during the development of Cycas male gametophyte I. Tube cell – Antheridial cell II. Body cell – Male gamete III. Stalk cell – Body cell IV. Prothallial cell – Antheridial cell I and III II and IV I and IV III and IV Ans:III and IV
52	Match the following with respect to Cycas A - V, B - III, C - IV, D - II A - V, B - I, C - IV, D - II A - IV, B - I, C - V, D - III A - V, B - IV, C - I, D - II Ans:A - V, B - I, C - IV, D - II
53	[A]: Cycas shows zooidogamy [R]: Cycas male gamete moves into archegonium by ciliary movement Both A and R are true and R is the correct explanation of A Both A and R are true but R is not the correct explanation of A A is true but R is false A is false but R is true Ans:A is true but R is false
54	Arrange the following of Cycas with gradual increase in the number. I. Maximum number of layers of secondary transfusion tissue. II. Number of cells present in the developed male gametophyte of Cycas III. Minimum number of Archegonia in female gametophyte IV. Maximum number of ovules on a megasporophyll III, IV, I, II III, I, II, IV III, II, I, IV IV, II, I, III Ans:III, I, II, IV
55	Nucellus of Cycas nourishes I. Embryo II. Endosperm III. Male gametophyte IV. Seedling II and III III and IV I and II II and IV Ans:II and III
56	Choose the incorrect statement free nuclear divisions are seen during Cycas embryogenesis Seed germination in Cycas is hypogeal Seeds of Cycas are Polyembryonic Anemochory is shown by Cycas Ans:Anemochory is shown by Cycas
57	Seed dormancy in Cycas is due to Impermeable seed coats Thick seed coats Physically under developed embryos Physiologically immature embryos Ans:Physiologically immature embryos
58	The part of embryo that has direct contact with Suspensor is Radicle Plumule Hypocotyl Coleorhiza Ans:Coleorhiza
59	Arrange the following structures present in Cycas seed in correct centripetal sequence. I. Tigellum II. Sclerotesta III. Endosperm IV. Perisperm I, IV, II, III II, IV, III, I II, III, IV, I II, III, I, IV Ans:II, IV, III, I
60	[A]: Seed of Cycas has tissues of 3 generations [R]: It has perisperm, female gametophyte and daughter sporophyte Both A and R are true and R is the correct explanation of A Both A and R are true but R is not the correct explanation of A A is true but R is false A is false but R is true Ans:Both A and R are true and R is the correct explanation of A
61	This is fern character of Cycas Absence of vegetative fertilisation Ornithochory having multiciliated male gametes Archegoniate female gametophyte Ans:having multiciliated male gametes
62	The cilia of Cycas male gametophyte are arranged in 3-4 circles 4-5 spirals 5-6 spirals 4-5 circles Ans:4-5 spirals
63	Match the following with respect to Cycas seed I and II II and III I and III All except IV Ans:II and III
64	[A]: Cycas shows heteromorphic alternation of generations [R]: It has morphologically different gametophytes Both A and R are true and R is the correct explanation of A Both A and R are true but R is not the correct explanation of A A is true but R is false A is false but R is true Ans:Both A and R are true but R is not the correct explanation of A
65	This structure of Cycas has relatively less number of cells Male gametophyte Female gametophyte Archegonium Perisperm Ans:Archegonium
66	Seeds of Cycas are dispersed by Birds Insects Wind Bats Ans:Birds
67	During Cycas seed germination the first structures that become aerial are Plumule Leaves Cotyledons Epicotyl Ans:Leaves
68	This is not the fern character of Cycas Independent sporophyte Industrial hairs on Microsporophyll Abaxial microsori dependent gametophyte Ans:dependent gametophyte
69	[A]: Life cycle in Cycas is described as Diplontic haplontic life cycle [R]: It has two haploid structures in its life cycle Both A and R are true and R is the correct explanation of A Both A and R are true but R is not the correct explanation of A A is true but R is false A is false but R is true Ans:Both A and R are true but R is not the correct explanation of A