REPRODUCTION IN ANGIOSPERMS ASSIGNMENT

1	Choose the correct statement Fibrous thickenings made of cellulose are extended from one radial wall to another radial wall of each endothecial cell of anther wall Fibrous thickenings are extended from outer tangential wall towards inner tangential wall of endothecial cells. Fibrous cellulose thickenings are extended from inner atangential walls to outer tangential walls of the endothecial cells Fibrous thickenings are seen on walls of endothecial cells Ans:Fibrous cellulose thickenings are extended from inner atangential walls to outer tangential walls of the endothecial cells
2	Tapetal cells of anther wall are described as I. Binucleate, Diploid II. Coenocytic, Diploid III. Binuclete, Haploid IV. Coenocytic, Haploid I and III II and IV I and II III and II Ans:I and II
3	[A]: Developed male gametophyte of angiosprerms has 3-cells [R]: 2 mitotic divisions occur in the pollen tube of angiosperms 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
4	The multilayerd structure of anther wall is The outermost layer present in the anther wall The structure present immediately below the outer most layer of anther wall The one that completely surrounds the sporogenous tissue of each microsporangium The structure in contact with both the endothecium and tapetum Ans:The structure in contact with both the endothecium and tapetum
5	Sporogenous tissue of Microsporangium is nourished by a structure of anther wall that has Hygroscopic nature Thin celll walls, dense cytoplasm and prominent nuclei Maximum development at the time of anther dehiscence Stomium Ans:Thin celll walls, dense cytoplasm and prominent nuclei
6	The protective structure of Pollen grain has Pectin and cellulose Pectin and Lignin Sporopollenin Cellulose and Cutin Ans:Sporopollenin
7	The pollen grain has Central nucleus, sparse protoplasm Peripheral nucleus, Dense cytoplasm Peripheral nucleus, Sparse protoplsm Central nucleus and Dense cytoplsm Ans:Central nucleus and Dense cytoplsm
8	Pollen grains with spinous ornamentations on their sporopollenin wall are seen in Fabaceae Malvaceae Solanaceae Liliaceae Ans:Malvaceae
9	Study the following table and choose the correct combination Structure of Micros porangium Character I Character II I)Epidermis Single layered Has stomium II)Microsporogenous tissue Multilayered Forms meiocytes III)Middle layers 1 to several layered Thin walled IV)Endothecium Single layered Hygroscopic I, II, III, IV I and II I and III II, III, IV Ans:I, II, III, IV
10	[A]: Polysiphonous pollen grains are seen in Cucubitaceae [R]: Pollen grains of Cucurbitaceae have several vegetative cells and generative cells 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
11	A dithecous anther has 2 longitudinal grooves 4 longitudinal grooves One longitudinal groove that separates the two thecae 3 longitudinal grooves Ans:3 longitudinal grooves
12	Reciprocal exchange of places is seen during the development of angiospremic male gametophyte. It is between Vegetative cell and generative cell Vegetative nucleus and male gametes Generative cell and vegetative nucleus Two male gametes Ans:Generative cell and vegetative nucleus
13	The first division in the microspore of an angiosperm is Anticlinal, Equal Periclinal, Equal Anticlinal and unequal Periclinal and Unequal Ans: Periclinal and Unequal
14	Upright ovule body is seen in I. Orthotropous ovule II. Anatropous ovule III. Circinotropous ovule IV. Hemitropous ovule I and II II and III III and IV I and III Ans:I and III
15	In one of the following types of embryosacs all the nuclei of female gametophyte genetically resemble each other in all aspects. Allium type Polygonum type Fritillaria type Peparomia Ans:Polygonum type
16	Polygonum type of embryosac was first discovered by Strasburger Nawaschin Hofmeister Nageli Ans:Strasburger
17	Filiform apparatus is chemically made of Cellulose, Proteins and Lipids Cellulose and Pectin Cellulose, pectin and Proteins Proteins and Lipids Ans:Cellulose and Pectin
18	Match the following related to the Polygonum type of embryosac of angiosperms List – I List – II A)Cell lacks its own cell wall I)Antipodal B)Two morphlogically similar cells II)Egg cell C)Cell involved in syngamy III)Central cell D)Ephemeral cell IV)Synergids V)Vegetative cell A-III, B-IV, C-II, D-I A-III, B-I, C-IV, D-II A-IV, B-III, C-I, D-II A-III, B-II, C-IV, D-I Ans:A-III, B-IV, C-II, D-I
19	Study the following structures of Dicot stem and choose the correct groups Structure Number of layers Nature of tissues I)Hypodermis 3 - 6 layered Completely collenchymatous in all dicots II)General cortex 5 – 10 layered Heterogenous and parenc hymatous III)Pericycle 3 – 5 layered Parenchymatous and rarely sclerenchy- matous IV)Medulla Many layered Parenchymatous I and II III and IV I, II, III II and IV Ans:II and IV
20	[A]: The vascular bundles of Helianthus stem are described as Conjoint [R]: Dicot stem bundles have Cambium between xylem and Phloem. 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
21	Cell A of embryosac nourishes the cell B of the same embryosac after fertilization. A and B are respectively Synergid, egg cell Central cell, egg cell Synergid, central cell Antipodal, egg cell Ans:Central cell, egg cell
22	Cytokinesis lacking Meiosis is shown by the ovules of Piper nigrum Fritillaria Allium Polygonum Ans:Fritillaria
23	Stele of Dicot stem is described as Eustele Atactostele Protostele Dictyostele Ans:Eustele
24	Nucellus shows enormous curvature in Circinotropous ovule Anatropous ovule Amphitropous ovule Hemitropous ovule Ans:Amphitropous ovule
25	Match the following List – I List – II A)Ovules of Plant with I)Circinotropous syngenecious anthers B)Ovules of plant with II)Hemitropous didelphy C)Ovules of plant without III) Anatropous sieve plates D)Ovule of plant with green, IV)Orthotropous succulent, flattened stem with areoles V)Campylotropous A-III, B-V, C-IV, D-I A-III, B-V, C-IV, D-II A-IV, B-III, C-I, D-II A-IV, B-V, C-II, D-I Ans:A-III, B-V, C-IV, D-I
26	[A]: Cuticle protects the plant from high temperature [R]: Cutin is impermeable to water 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
27	Plant whose inflorescence has sympodial axis adnated to the stem with Amphiphloeic eustele has the following pollination contrivance. Self sterillity Dicliny Dichogamy Herkogamy Ans:Dichogamy
28	[A]: Cleistogamy is seen in Commelina [R]: Closed flowers always show Autogamy 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
29	Diclinous and monoclinous flowers are seen in I. Tridax II. Mangifera III. Polygonum I and II II and III I, II, III I and III Ans:I, II, III
30	Only xenogamy is shown by Cycas Cocos Ficus Tridax Ans:Cycas
31	Self pollination is absent in I. Smilax II. Ruscus III. Pisum I, II I, II, III II, III only I Ans:I, II
32	Stigmatic lobes are closed during the breakage of anthers in Martynia Helianthus Hibiscus Abutilon Ans: Martynia
33	Match the following Plant description Pollination contrivance A)Plant whose leaf apex is I)Heterostyly modified into tendril B)Plant with Axillary tendril II)Herkogamy C)Plant in which stamens of three III)Movement of floral parts different heights are seen in different flowers D)Plant with spinous leaf margins IV)Autogamy and ephermeral calyx V)Self sterility A-II, B-III, C-I, D-V A-II, B-V, C-I, D-IV A-II, B-V, C-III, D-IV A-II, B-V, C-I, D-III Ans:A-II, B-V, C-I, D-III
34	Ebbryosac was first discovered in Anatropous ovule Orthotropous ovule Campylotropous ovule Amphitropous ovule Ans:Orthotropous ovule
35	The most common type of ovule in Angiosperms is orthotropous Anatropous Campylotropous Amphitropous Ans:Anatropous
36	Match the following List – I List – II A)Dikaryotic cell I)Endothecial cell B)Cell that forms pollen tube II)Epidermal cell C)Cell that gives rise male gametes III)Central cell D)Cell that is part of stomium IV)Generative cell V)Vegetative cell A-V, B-III, C-II, D-IV A-III, B-V, C-IV, D-I A-III, B-V, C-IV, D-II A-III, B-I, C-II, D-V Ans:A-III, B-V, C-IV, D-II
37	Rhizome with flowers is seen in Streptocarpus Commelina Gloriosa Zingiber Ans:Commelina
38	Revolute stigmatic lobes are seen in plants with the following pollination contrivance Sensitive stigmas Safety mechanism Heterostyly Herkogamy Ans:Safety mechanism
39	Mammals are involved in the cross pollination of Bignonia Kigelia Cestrum Aroids Ans:Kigelia
40	Cross pollination in plants with simple spadix is best described as Malacophilous dicliny Malacophilous monocliny Ornithophilous dicliny Chiropteriphilous dicliny Ans:Malacophilous dicliny