Tuesday, March 13, 2012

REPRODUCTION IN ANGIOSPERMS ASSIGNMENT

1 Choose the correct statement




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





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





Ans: A is true but R is false
4 The multilayerd structure of anther wall is




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




Ans:Thin celll walls, dense cytoplasm and prominent nuclei
6 The protective structure of Pollen grain has




Ans:Sporopollenin
7 The pollen grain has




Ans:Central nucleus and Dense cytoplsm
8 Pollen grains with spinous ornamentations on their sporopollenin wall are seen in




Ans:Malvaceae
9 Study the following table and choose the correct combination
Structure of Micros
porangium
Character I Character II
I)EpidermisSingle layered Has stomium
II)Microsporogenous tissue Multilayered Forms meiocytes
III)Middle layers1 to several layered Thin walled
IV)EndotheciumSingle layered Hygroscopic





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





Ans:A is true but R is false
11 A dithecous anther has




Ans:3 longitudinal grooves
12 Reciprocal exchange of places is seen during the development of angiospremic male gametophyte. It is between




Ans:Generative cell and vegetative nucleus
13 The first division in the microspore of an angiosperm is




Ans: Periclinal and Unequal
14 Upright ovule body is seen in
I. Orthotropous ovule  II. Anatropous ovule 
III. Circinotropous ovule  IV. Hemitropous ovule





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.




Ans:Polygonum type
16 Polygonum type of embryosac was first discovered by




Ans:Strasburger
17 Filiform apparatus is chemically made of




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





Ans:A-III, B-IV, C-II, D-I
19 Study the following structures of Dicot stem and choose the correct groups
StructureNumber of layers Nature of tissues
I)Hypodermis3 - 6 layered Completely collenchymatous
in all dicots
II)General cortex 5 – 10 layered Heterogenous and parenc
hymatous
III)Pericycle3 – 5 layered Parenchymatous and
rarely sclerenchy-
matous
IV)MedullaMany layered Parenchymatous





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.





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




Ans:Central cell, egg cell
22 Cytokinesis lacking Meiosis is shown by the ovules of




Ans:Fritillaria
23 Stele of Dicot stem is described as




Ans:Eustele
24 Nucellus shows enormous curvature in




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





Ans:A-III, B-V, C-IV, D-I
26 [A]: Cuticle protects the plant from high temperature
[R]: Cutin is impermeable to water





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.




Ans:Dichogamy
28 [A]: Cleistogamy is seen in Commelina
[R]: Closed flowers always show Autogamy





Ans:A is true but R is false
29 Diclinous and monoclinous flowers are seen in
I. Tridax II. Mangifera III. Polygonum





Ans:I, II, III
30 Only xenogamy is shown by




Ans:Cycas
31 Self pollination is absent in
I. Smilax II. Ruscus III. Pisum





Ans:I, II
32 Stigmatic lobes are closed during the breakage of anthers in




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





Ans:A-II, B-V, C-I, D-III
34 Ebbryosac was first discovered in




Ans:Orthotropous ovule
35 The most common type of ovule in Angiosperms is




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





Ans:A-III, B-V, C-IV, D-II
37 Rhizome with flowers is seen in




Ans:Commelina
38 Revolute stigmatic lobes are seen in plants with the following pollination contrivance




Ans:Safety mechanism
39 Mammals are involved in the cross pollination of




Ans:Kigelia
40 Cross pollination in plants with simple spadix is best described as




Ans:Malacophilous dicliny

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ASTHRA JUNIOR COLLEGE , VIJAYAWADA