17590.An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is
Lignin
Cellulose
Cuticle
Sporopollenin
17591.The coconut water and the edible part of coconut are equivalent to
Mesocarp
Embryo
Endosperm
Endocarp
17593.In the fully organized polygonum type of embryo sac, what is the ratio of haploid, diploid and triploid nuclei?
6 : 1 : 0
6 : 0 : 1
3 : 1 : 3
3 : 2 : 3
17596.Which type of association is found in between entomophilous flower and pollinating agent?
Cooperation
Commensalism
Mutualism
Coevolution
17597.Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called
Geitonogamy
Xenogamy
Autogamy
Karyogamy
17598.The process of fusion of male gamete with the polar nuclei is known as _____.
Fertilization
Triple fusion
Syngamy
None
17599.In which one of the following, male and female gametophytes do not have free living independent existence?
Funaria
Pteris
Cedrus
Polytrichum
17600.The tenuinucellate ovule has
Small amount of nucellus
Large amount of nucellus
Chalazal nucellus
Micropyle nucellus
17601.When the other floral parts are arranged at the base of the gynoecium, the flower is called :
Perigynous flower
Epigynous flower
Hypogynous flower
None of these
17603.Endosperm is formed during the double fertilization by:
Ovum and male gamete
One polar nuclei and one male gamete
Two polar nuclei and one male gamete
Two polar nuclei and two male gametes
17604.In Angiosperms pollen tube liberate their male gametes into the:
Egg cell
Antipodal cells
Central cell
Synergids
17608.Which one of the following is not a correct explanation of cross pollination?
The pollen grains of male flowers are transferred to the stigma of the female flowers
The pollen grains are transferred from one flower to another flower, of another plant of the same species
The pollen grains are transferred from one flower to another flower situated on the same plant
The pollen grains of one flower are transferred to the stigma of the same flower
17609.What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its roots tip cells?
21
42
63
84
17610.Which one of the following statements is wrong?
Intine is made up of cellulose and pectin
Vegetative cell is larger than generative cell
Pollen grains in some plants remain viable for months
When pollen is shed at two-celled stage, double fertilization does not take place
17611.
Consider the following statements and chose the correct option.
(a) The genetic constitution of a plant is unaffected in vegetative propagation
(b) Rhizome in ginger serves as an organ of vegetative reproduction
(c) Totipotency of cells enables us to micropropagate plants
Statements (b) alone is true
Statements (a) and (b) alone are true
Statements (b) and (c) alone are true
All the three statements (a), (b) and (c) are true
17612.Double fertilization involves:
Fertilization of the egg by two male gametes.
Fertilization of two eggs in the same embryo sac by two sperms brought by one pollen tube.
Fertilization of the egg and the central cell by two sperms brought by different pollen tubes.
Fertilization of the egg and the central cell by two sperms brought by the same pollen tube
17613.The first cell of suspensor towards micropyle which absorbs food material is
Hypophysis
Haustoria
Radicle
Transverse cell
17614.Grafting is successful in dicots but not in monocots because the dicots have:
cork cambium
vessels with elements arranged end to end
vascular bundles arranged in a ring
cambium for secondary growth
17615.In which one pair both the plants can be vegetatively propagated by leaf pieces
Asparagus and Bryophyllum
Agave and Kalanchoe
Bryophyllum and Kalanchoe
Chrysanthemum and Agave
17616.Match the following ovular structure with post fertilization structure and select the correct alternative.
| A. | Ovule | 1. | Endosperm |
| B. | Funiculus | 2. | Aril |
| C. | Nucellus | 3. | Seed |
| D. | Polar nuclei | 4. | Perisperm |
A = 2, B = 3, C = 4, D = 1
A = 2, B = 3, C = 1, D = 4
A = 3, B = 2, C = 4, D = 1
A = 3, B = 2, C = 1, D = 4
17617.The arrangement of the nuclei in a normal embryo sac in the dicot plants is
2 + 3 + 3
3 + 2 + 3
2 + 4 + 2
3 + 3 + 2
17618.Apomictic embryos in citrus arise from
Maternal sporophytic tissue in ovule
Synergids
Diploid egg
Antipodal cells
17619.Fibrous thickenings of hygroscopic nature are found in this part of the anther wall:
Middle layers
Endothecium
Epidermis
Tapetum
17620.In a type of apomixis known as adventive embryony, embryos develop directly from the
Zygote
Nucellus or integuments
Synergids or antipodals in an embryo sac
Accessory embryo sacs in the ovule
17621.In nature, cleistogamous flowers are
wind pollinated
insect pollinated
self pollinated
bird pollinated
17622.Which one of the following pairs of plant structures has haploid number of chromosomes?
Egg cell and antipodal cells
Megaspore mother cell and antipodal cells
Egg nucleus and secondary nucleus
Nucellus and antipodal cells
17623.Which one of the following is surrounded by a callose wall?
Male gamete
Microspore mother cell
Pollen grain
Egg
17624.Study the following table and select the most correct option given below the table.
| List –I | List –II |
|---|---|
| (Structure before seed formation) | (Structure after seed formation) |
| A. Funiculus | I. Hilum |
| B. Scar of Ovule | II. Tegmen |
| C. Zygote | III. Testa |
| D. Inner integument | IV. Stalk of seed |
| V. Embryo |
A - V, B - I, C - II, D - IV
A - III, B - IV, C - I, D - V
A - IV, B - I, C - V, D - II
A - IV, B - V, C - III, D - II
17625.What is the function of germ pore?
Initiation of pollen tube
Absorption of water for seed germination
Emergence of radicle
Release of male gametes
17626.Which of the following pairs in angiosperms are diploid and triploid, respectively?
Polar nucleus and secondary nucleus
Microspore mother cell and egg cell
Secondary nucleus and endosperm
Endosperm and antipodal cells
17627.Which of the following statements about sporopollenin is false?
Exine has apertures called germ pores where sporopollenin is present
Sporopollenin is one of the resistant organic materials
Exine is made up of sporopollenin
Sporopollenin can withstand high temperatures and strong acids
17628.Tapetum is present between
Epidermis and endothecium
Endothecium and middle layers
Epidermis and middle layers
Middle layers and sporoangenous tissue
17635.Cleistogamous flowers are always
Insect pollinated
Wind pollinated
Cross pollinated
Self pollinated
17637.Entomopjilous flowers are with
Dry and smooth pollen
Sticky and rough pollen
Less numbers of pollens
Brightly coloured pollens
17639.If an endosperm cell of an angiosperm contains 24 chromosomes, the number of chromosomes in each cell of the root will be
8
4
16
24