Reproduction in plants

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Reproduction in plants_2

Prepared by Dr. Darekar P. V.

25)Which one of the following represents an ovule, where the embryo sac becomes horse-shoe shaped and the funiculus and micropyle are close to each other ? *

4 points

B) Anatropous

A) Circinotropous

C) Amphitropous

D) Atropous

8)Nucellar polyembryony is reported in species of : *

4 points

A) Citrus

D) Brassica.

C) Triticum

B) Gossypium

17) Which of these is a condition that makes flowers invariably autogamous ? *

4 points

A) Dioecy

(E) Syngamy.

C) Cleistogamy

D) Xenogamy

B) Self incompatibility

19) The nucellus of the ovule is : *

4 points

C) Triploid

A) Haploid

D) Polyploid.

B) Diploid

11) Pollen tube usually enters the embryo sac : *

4 points

D) directly penetrate the egg.

C) through one of synergids

A) between one synergid and central cell

B) by knocking of antipodal cell

7) The phenomenon observed in some plants wherein parts of the sexual apparatus is used for forming embryos without fertilisation is called : *

4 points

B) Apomixis

C) Vegetative propagation

D) Sexual reproduction

A) Parthenocarpy

9)Why is vivipary an undesirable character for annual crop plants ? *

4 points

A) It reduces the vigour of the plant.

D) It adversely affects the fertility of the plant.

C) The seeds exhibit long dormancy

B) The seeds cannot be stored under normal conditions for the next season.

21) Development of embryo sac from any cell of nucellus is called : *

4 points

C) Parthenogenesis

A) Apogamy

B) Apospory

D) Sporogenesis

24)A plant root has 16 cells thus : *

4 points

D) endosperm has 8 cells.

B) gamete has 8 cells

C) endosperm has 16 cells

A) gamete has 16 cells

2) A mature male gametophyte is formed from pollen mother cell by : *

4 points

C) One meiotic and two mitotic divisions

B) Two meiotic divisions

A) One meiotic division

D) Three meiotic divisions.

12) Select the mismatched pair. *

4 points

C) Pollen grain - Male gamete

A) Microsporangium - Pollen sac

D) Embryo sac - Female gametophyte.

B) Megasporangium - Ovule

18) Double fertilization was given by : *

4 points

B) Maxwell

A) Nawaschin

C) Einstein

D) Antony Hewert.

14) The outermost and innermost wall layers of microsporangium in an anther are respectively : *

4 points

D) Epidermis and tapetum

B) Epidermis and endodermis

A) Endothecium and tapetum

C) Epidermis and middle layer

3) Progeny resulting from cross-pollination : *

4 points

A) Show greater genetic variability and are evolutionarily important

C) Are always sterile

D) Always show recessive characters.

B) Are homozygous and show phenotypic uniformity

10) Given below are the events that are observed in an artificial hybridization programme. Arrange them in the correct sequential order. (1) re-bagging; (2) selection of parents; (3) bagging; (4) dusting the pollen on stigma; (5) emasculation; (6) collection of pollen from male parent. *

4 points

B) 2 --> 5 --> 3 --> 6 --> 4 --> 1

A) 2 --> 3 --> 5 --> 6 --> 4 --> 1

C) 5 --> 2 --> 3 --> 6 --> 1 --> 4

D) 2 --> 3 --> 6 --> 4 --> 5 --> 1.

16) In some plants anthers and stigma grow and mature at same time. This phenomenon is called *

4 points

D) Fusion.

A) Homogamy

C) Allogamy

B) Syngamy

6)Select the mismatched pair. *

4 points

A) Storage of pollen grains - 196°C

C) Chasmogamous flowers - Exposed anthers and stigmas

D) Xenogamy - Self pollination

B) Pollen allergy - Carrot grass

4) Formation of an organiser from a single, male gamete without fusion with egg is an example of : *

4 points

B) Apogamy

A) Parthenogenesis

D) Parthenocarpy.

C) Apospory

1) The method of fertilization (in an angiosperm) in which the pollen tube enters the ovule by way of micropyle is known as : *

4 points

C) microgamy

A) chalazogamy

D) syngamy.

B) porogamy

22)Stigma is always sticky and rough in : *

4 points

C) entomophilous flowers

D) All the above types of flowers.

B) hydrophilous flowers

A) anemophilous flowers

20) In a bisexual flower when the gynoecium matures earlier than anther, it is called as : *

4 points

B) protogyny

A) protandry

D) None of the above.

C) herkogyny

23)In the embryos of a typical grass, true homologous structures are : *

4 points

A) Coleorhiza and coleoptile

C) Cotyledons and scutellum

D) Hypocotyl and radicle

B) Coleoptiie and scutellum

5) The inner integument of majority of the dicot seed is : *

4 points

B) scutellum

D) tegmen

A) hypocotyl

C) funicle

15) A typical example of cross pollination is : *

4 points

B) Rice (Oryza sativa)

C) Cotton (Gossypium)

A) Wheat (Triticum)

D) Zea mays.

13) From among the sets of terms given below, identify those that are associated with the gynoecium. *

4 points

A) Stigma, ovule, embryo sac, placenta

B) Thalamus, pistil, style, ovule

C) Ovule, ovary, embryo sac, tapetum

D) Ovule, stamen, ovary, embryo sac

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