An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is
1.Lignin
2.Cellulose
3.Cuticle
4.Sporopollenin
Apomictic embryos in citrus arise from
1.Maternal sporophytic tissue in ovule
2.Synergids
3.Diploid egg
4.Antipodal cells
Apomixis is a type of reproduction that results is the development of a/an
1.New organism without fusion of gametes
2.New organism from fusion products of gametes
3.Embryo from endosperm
4.Embryo from nucellus
Both, autogamy and geitonogamy are prevented in
1.Castor
2.Maize
3.Cucumber
4.Papaya
Double fertilization was first discovered by Nawaschin (1898) in
1.Lilium and Fritillaria
2.Mango and Sugarcane
3.Papaya and Pea
4.Brassica and Candytuft
Egg apparatus consists of
1.Egg
2.Egg and polar nuclei
3.Egg and synergids
4.Egg and antipodal cells
Endosperm is formed during the double fertilization by:
1.Ovum and male gamete
2.One polar nuclei and one male gamete
3.Two polar nuclei and one male gamete
4.Two polar nuclei and two male gametes
Even in absence of pollinating agents seed-setting is assured in
1.Salvia
2.Fig
3.Zostera
4.Commelina
Fibrous thickenings of hygroscopic nature are found in this part of the anther wall:
1.Middle layers
2.Endothecium
3.Epidermis
4.Tapetum
Grafting is successful in dicots but not in monocots because the dicots have:
1.cork cambium
2.vessels with elements arranged end to end
3.vascular bundles arranged in a ring
4.cambium for secondary growth
In a type of apomixis known as adventive embryony, embryos develop directly from the
1.Zygote
2.Nucellus or integuments
3.Synergids or antipodals in an embryo sac
4.Accessory embryo sacs in the ovule
In anatropous ovule what is the direction of micropyle?
1.Right
2.Downward
3.Upward
4.Left
In Angiosperms pollen tube liberate their male gametes into the:
1.Egg cell
2.Antipodal cells
3.Central cell
4.Synergids
In nature, cleistogamous flowers are
1.wind pollinated
2.insect pollinated
3.self pollinated
4.bird pollinated
In the fully organized polygonum type of embryo sac, what is the ratio of haploid, diploid and triploid nuclei?
1.6:01:00
2.6:00:01
3.3:01:03
4.3:02:03
In which one of the following, male and female gametophytes do not have free living independent existence
1.Funaria
2.Pteris
3.Cedrus
4.Polytrichum
In which one pair both the plants can be vegetatively propagated by leaf pieces
1.Asparagus and Bryophyllum
2.Agave and Kalanchoe
3.Bryophyllum and Kalanchoe
4.Chrysanthemum and Agave
Male gametes in angiosperms are formed by the division of:
1.Generative cell
2.Microspore
3.Microspore mother cell
4.Vegetative cell
Ornithophily refers to the pollination by which of the following:
1.Snails
2.Birds
3.Insects
4.Air
Ovule is attached to the placenta of ovary wall by:
1.Funicle
2.Raphae
3.Hilum
4.Testa
Plants with ovaries having only one or a few ovules, are generally pollinated by
1.Birds
2.Butterflies
3.Bees
4.Wind
Special Olympics World Games 2019 begins at which city?
1.Bishkek
2.Paris
3.Abu Dhabi
4.New York
Sporopollenin is chemically
1.Protein
2.Fatty substance
3.Homopolysaccharide
4.Heteropolysaccharide
The aleurone layer in maize grain is specially rich in
1.Lipids
2.Starch
3.Auxins
4.Proteins
The arrangement of the nuclei in a normal embryo sac in the dicot plants is
1.2 + 3 + 3
2.3 + 2 + 3
3.2 + 4 + 2
4.3 + 3 + 2
The coconut water and the edible part of coconut are equivalent to
1.Mesocarp
2.Embryo
3.Endosperm
4.Endocarp
The gynoecium consists of many free pistils in flowers of
1.Papaver
2.Michelia
3.Aloe
4.Tomato
The pollen are liberated in Cassytha by:
1.Transverse dehiscence
2.Longitudinal dehiscence
3.Porous dehiscence
4.Valvular dehiscence
There are 10 flowers in one individual plant of Crotalaria. In each microsporangium of every stamen of all the flowers, there are 30 microspore mother cells. How many pollen grains are formed from tha
1.48,000
2.24,000
3.10,000
4.4,000
Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called
1.Geitonogamy
2.Xenogamy
3.Karyogamy
4.Autogamy
Vernalisation stimulates flowering in
1.Carrot
2.Turmeric
3.Elephant yam
4.Ginger
What is the function of germ pore?
1.Initiation of pollen tube
2.Absorption of water for seed germination
3.Emergence of radicle
4.Release of male gametes
What is the ratio of equational divisions that take place in Cycas and angiosperms respectively leading to the formation of male gametes from pollen grains?
1.2:01
2.3:01
3.3:02
4.2:03
What is the theme of this year,s World Kidney Day?
1.Kidney and Health
2.Healthy Lifestyle for Healthy Kidneys
3.Kidney Health for Everyone, Everywhere
4.Kidney Disease and Obesity
What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its roots tip cells?
1.21
2.42
3.63
4.87
When the other floral parts are arranged at the base of the gynoecium, the flower is called :
1.Perigynous flower
2.Epigynous flower
3.Hypogynous flower
4.None of these
Which bank has launched doorstep banking service for senior citizens over 70 years of age and differently-abled customers recently?
1.BOB
2.IDBI
3.SBI
4.PNB
Which company to launch digital innovation center ar Bucharest in Romania to develop software for clients based on cloud, big data, artificial intelligence, and machine learning?
1.Wipro
2.HCL
3.Infosys
4.TCS
Which of the following pairs in angiosperms are diploid and triploid, respectively?
1.Polar nucleus and secondary nucleus
2.Microspore mother cell and egg cell
3.Secondary nucleus and endosperm
4.Endosperm and antipodal cells
Which of the following statements about sporopollenin is false?
1.Exine has apertures called germ pores where sporopollenin is present
2.Sporopollenin is one of the resistant organic materials
3.Exine is made up of sporopollenin
4.Sporopollenin can withstand high temperatures and strong acids
Which one of the following is surrounded by a callose wall?
1.Male gamete
2.Microspore mother cell
3.Pollen grain
4.Egg
Which one of the following pairs of plant structures has haploid number of chromosomes?
1.Egg cell and antipodal cells
2.Megaspore mother cell and antipodal cells
3.Egg nucleus and secondary nucleus
4.Nucellus and antipodal cells
Which one of the following statements is wrong?
1.Intine is made up of cellulose and pectin
2.Vegetative cell is larger than generative cell
3.Pollen grains in some plants remain viable for months
4.When pollen is shed at two-celled stage, double fertilization does not take
Which team won the Bombay Gold Cup Hockey Team crown 2019?
1.Indian Oil
2.ONGC
3.Punjab And Sind Bank
4.Bank of Baroda
Which type of association is found in between entomophilous flower and pollinating agent?
1.Cooperation
2.Commensalism
3.Mutualism
4.Coevolution
Who has been selected for prestigious Kusumagraj national award for literature?
1.SS Jain Nath
2.VV Shirwadkar
3.Ved Rahi
4.VV Nath
Who was conferred with the Param Vishisht Seva Medal, by President Ramnath Kovind for distinguished services?
1.Bipin Rawat
2.GD Bakshi
3.Devendra Sikri
4.Prabhat Singh
Who was conferred with the Param Vishisht Seva Medal, by President Ramnath Kovind for distinguished services?
1.Bipin Rawat
2.GD Bakshi
3.Devendra Sikri
4.Prabhat Singh
Wind pollinated flowers are
1.Small, producing large number of dry pollen grains
2.Small, brightly coloured, producing large number of pollen grains
3.Small, producing nectar and dry pollen
4.Large, producing abundant nectar and pollen
Wind pollination is common in
1.Legumes
2.Orchids
3.Lilies
4.Grasses