Antheridia and archegonia are born on _____ in bryophytes
1.Sporophyte
2.Gametophyte
3.Both of these
4.None of these
Posted Date:-2021-09-01 20:36:05
Antheridiophore and archegoniophore are found in
1.Marchantia
2.Funaria
3.Both of these
4.None of these
Posted Date:-2021-09-01 20:36:05
Antherozoids the male gamete in bryophytes are attracted towards Archegonium i.e. female sex organ by
1.Phototactic phenomenon
2. Chemotactic phenomenn
3.Geotropic phenomenon
4.Chemotropic movement
Posted Date:-2021-09-01 20:36:05
Approximately _____ species of bacteria are known to cause diseases in humans.
1.100
2.200
3.300
4.400
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Bryophtes are called amphiabians of plant world because
1.Bryophytes like amphibian ancestors are one of the most primitive organisms in this world.
2.Bryophytes like amphibian live in damp shady places and close to water body.
3.Amphibians have close relation with bryophytes in their habitat.
4.All of these
Posted Date:-2021-09-01 20:36:05
Chemical substances used on living tissues that inhibit the growth of micro organism are called
1.Antiseptics
2.Disinfectants
3.Antibiotics
4.Vaccines
Posted Date:-2021-09-01 20:36:05
Cyanobacteria have _____ cell wall
1.Gram +ve.
2.Gram - ve.
3.Acid fast
4.Cellulose rich
Posted Date:-2021-09-01 20:36:05
Cyanobacteria reproduce by:
1.Binary fission
2.Mitosis
3.Meiosis
4.Conjugation
Posted Date:-2021-09-01 20:36:05
E. coli and example of
1.Aerobic bacteria
2.Anaerobic bacteria
3.Facultative bacteria
4.Microaerophilic
Posted Date:-2021-09-01 20:36:05
Equistem is an example of
1.Psilopsida
2.Lycopsida
3.Sphenopsida
4.Prteropsida
Posted Date:-2021-09-01 20:36:05
Ferns are included in
1.Psilopsida
2.Lycopsida
3.Sphenopsida
4.Pteropsida
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Gametophyte of Psilopsida develops a symbiotic association with which of the following?
1.Algae
2.Bacteria
3.Protozoa
4.Fungus
Posted Date:-2021-09-01 20:36:05
Ground pries are also known as
1.Lycopods
2.Spike mosses
3.Both of these
4.None of these
Posted Date:-2021-09-01 20:36:05
Hornwarts are included in sub-class
1.Anthoceropsida
2.Bryopsida
3.Hepaticopsida
4.Psilopsida
Posted Date:-2021-09-01 20:36:05
Horsetails are included in class
1.Sphenopeida
2.Lycopsida
3.Psilopsida
4.Pteropsida
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In bryophytes fertilization takes place in
1.Antheridia
2.Archegonia
3.water
4.Ovule
Posted Date:-2021-09-01 20:36:05
In Hornworts the band of meristematic tissue is found near
1.Foot
2.Gamete producing region
3.Spore producing region
4.At junction of a & b
Posted Date:-2021-09-01 20:36:05
In term of spore production Selaginella is characterized by
1.Homosporous
2.Hetrosporous
3.Both depending upon the conditions
4.None of these
Posted Date:-2021-09-01 20:36:05
Megaphylls are characteristic for
1.Ferns
2.Seed plants
3.Both of these
4.None of these
Posted Date:-2021-09-01 20:36:05
Megaphylls i.e. leaves with divided veins with an expanded lamina is a dharacteristic of :
1.Lycopods
2.Ferns
3.Seed plants
4.Both b and c
Posted Date:-2021-09-01 20:36:05
Mosses are included in sub-division
1.Anthoceropsida
2.Hepaticopsida
3.Bryopsida
4.Lycopsida
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Of the following which one is most advanced ?
1.Anthoceropsida
2.Bryopsida
3.Hepaticopsida
4.None of these
Posted Date:-2021-09-01 20:36:05
Of the following which one is not the characteristic of the plants included in psilopsida?
1.Gametophyte is colourless
2.They have mycorrhizal association
3.Rhizoids bear Rhizome
4.Aerial branches have veinless outgrowths
Posted Date:-2021-09-01 20:36:05
Production of two types of spores is known as
1.Heterospory
2.Homospory
3.Heterogamy
4.Gamospory
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Protonema is
1.Thallus like
2.Algae like
3.Fungus like
4.Plant like
Posted Date:-2021-09-01 20:36:05
Rapid growth at exponential ration occurs in which phase of bacterial growth:
1.Lag phase
2.Log phase
3.Stationary phase
4.Death / decline phase
Posted Date:-2021-09-01 20:36:05
Sex pili is formed in which of the following processes:
1.Binary fission
2.Mitosis
3.Sexual reproduction
4.Conjugation
Posted Date:-2021-09-01 20:36:05
Spirochete is an example of
1.Aerobic bacteria
2.Anaerobic bacteria
3.Facultative bacteria
4.Microaerophilic
Posted Date:-2021-09-01 20:36:05
Sporangia of which of the following tracheopytes develop singly on the upper side of sporophylls which may or may not be arranged to form strobili.
1.Psilopsida
2.Lycopsida
3.Sphenopsida
4.Prteropsida
Posted Date:-2021-09-01 20:36:05
Sporophyte is
1.Monoploid
2.Haploid
3.Diploid
4.Polyploidy
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Stem of Psilophyton an example of psilogsida is differentiated into an underground rhizome and an aerial part both of which are _____ branched
1.Isotomous
2.Dichotomously
3.Trichotomously
4.Multichotomously
Posted Date:-2021-09-01 20:36:05
The arrangement of unequal dichotomous branches in one plane during evolution of leaves is called
1.Overtopping
2.Fusion
3.Webbing
4.Planation
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The dichotomously branching system has shape similar to
1.U
2.R
3.Y
4.Fork
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The first cell of the sporophyte generation is
1.Oospore
2.Spore mother cell
3.Spore
4.Gamete
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The part of sporophyte which is called sporangium is
1.Capsule
2.Foot
3.Stalk
4.None of these
Posted Date:-2021-09-01 20:36:05
The simplest of all bryophytes are
1.Thallophytes
2.Embryophytes
3.Mosses
4.Liverworts
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The space between the overtopped dichotomous branches was occupies by a sheet of _____ cells during evolution of megaphyllas.
1.Sclerenchyma
2.Chlorenchyma
3.Parenchyma
4.Collenchyma
Posted Date:-2021-09-01 20:36:05
The zygote formed in liverworts is
1.Unicellular
2.Mulicellular
3.Multinucleate
4.None of these
Posted Date:-2021-09-01 20:36:05
Today the land habitat is dominated by
1.Fungi
2.Gymnosperms
3.Angiosperms
4.Tracheophytes
Posted Date:-2021-09-01 20:36:05
Which of the following group of tracheophyta has expanded or scale like leaves which are alwaysed arranges in whorls?
1.Psilopsida
2.Lycopsida
3.Sphenopsida
4.Prteropsida
Posted Date:-2021-09-01 20:36:05
Which of the following help cyanobacteria to locomote?
1.Flagella
2.Gas vesicles
3.Both of these
4.None of these
Posted Date:-2021-09-01 20:36:05
Which of the following is an example of the living member of Psilopsida?
1.Rhynia
2.Psilophyton
3.Psilotum
4.Cooksonia
Posted Date:-2021-09-01 20:36:05
Which of the following of bryophytes are the simplest one?
1.Porella
2.Funaria
3.Anthocerus
4.Polytrichum
Posted Date:-2021-09-01 20:36:05
Which of the following plant group first formed true leaves?
1.Psilopsida
2.Lycopsida
3.Sphenopsida
4.Pteropsida
Posted Date:-2021-09-01 20:36:05
Which of the following statement about alternation of generation in bryophytes is incorrect?
1.It involves alternation of morphologically different generations
2.Their gametophyte is independent while sporophyte depends upon gametophyte for nutrition.
3.Both the gametophyte and sporophytes are haploid generations thus can produce haploids gametes to continue the diploid number on fertilization
4.Spore formation occurs through meiosis
Posted Date:-2021-09-01 20:36:05
Which of the following statement about filicinae a group of tracheophytes is incorrect:
1.They belong to sphenopsida
2.They are seedless and their leaves are called fronds
3.They live in shady and moist areas.
4.They show circinate vernation.
Posted Date:-2021-09-01 20:36:05
Which of the following statement about plants is incorrect?
1.All are eukaryotes
2.They are multicellular.
3.Non-motile organisms
4.Are heterotrophes
Posted Date:-2021-09-01 20:36:05
Which of the following tracheophytes are also called arthrophytes?
1.Psilopsids
2.Lycopsids
3.Sphenopsids
4.Prteropsids
Posted Date:-2021-09-01 20:36:05
Which of the following tracheophytes are leafless?
1.Psilopsida
2.Lycopsida
3.Sphenopsida
4.Prteropsida
Posted Date:-2021-09-01 20:36:05
Who developed the vaccine against anthrax?
1.Louis Pasteur
2.Edward Jennar
3.Leuvenhoek
4.Alexander Fleming
Posted Date:-2021-09-01 20:36:05