Antheridia and archegonia are born on _____ in bryophytes
1.Sporophyte
2.Gametophyte
3.Both of these
4.None of these
Antheridiophore and archegoniophore are found in
1.Marchantia
2.Funaria
3.Both of these
4.None of these
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
Approximately _____ species of bacteria are known to cause diseases in humans.
1.100
2.200
3.300
4.400
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
Chemical substances used on living tissues that inhibit the growth of micro organism are called
1.Antiseptics
2.Disinfectants
3.Antibiotics
4.Vaccines
Cyanobacteria have _____ cell wall
1.Gram +ve.
2.Gram - ve.
3.Acid fast
4.Cellulose rich
Cyanobacteria reproduce by:
1.Binary fission
2.Mitosis
3.Meiosis
4.Conjugation
E. coli and example of
1.Aerobic bacteria
2.Anaerobic bacteria
3.Facultative bacteria
4.Microaerophilic
Equistem is an example of
1.Psilopsida
2.Lycopsida
3.Sphenopsida
4.Prteropsida
Ferns are included in
1.Psilopsida
2.Lycopsida
3.Sphenopsida
4.Pteropsida
Gametophyte of Psilopsida develops a symbiotic association with which of the following?
1.Algae
2.Bacteria
3.Protozoa
4.Fungus
Ground pries are also known as
1.Lycopods
2.Spike mosses
3.Both of these
4.None of these
Hornwarts are included in sub-class
1.Anthoceropsida
2.Bryopsida
3.Hepaticopsida
4.Psilopsida
Horsetails are included in class
1.Sphenopeida
2.Lycopsida
3.Psilopsida
4.Pteropsida
In bryophytes fertilization takes place in
1.Antheridia
2.Archegonia
3.water
4.Ovule
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
In term of spore production Selaginella is characterized by
1.Homosporous
2.Hetrosporous
3.Both depending upon the conditions
4.None of these
Megaphylls are characteristic for
1.Ferns
2.Seed plants
3.Both of these
4.None of these
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
Mosses are included in sub-division
1.Anthoceropsida
2.Hepaticopsida
3.Bryopsida
4.Lycopsida
Of the following which one is most advanced ?
1.Anthoceropsida
2.Bryopsida
3.Hepaticopsida
4.None of these
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
Production of two types of spores is known as
1.Heterospory
2.Homospory
3.Heterogamy
4.Gamospory
Protonema is
1.Thallus like
2.Algae like
3.Fungus like
4.Plant like
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
Sex pili is formed in which of the following processes:
1.Binary fission
2.Mitosis
3.Sexual reproduction
4.Conjugation
Spirochete is an example of
1.Aerobic bacteria
2.Anaerobic bacteria
3.Facultative bacteria
4.Microaerophilic
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
Sporophyte is
1.Monoploid
2.Haploid
3.Diploid
4.Polyploidy
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
The arrangement of unequal dichotomous branches in one plane during evolution of leaves is called
1.Overtopping
2.Fusion
3.Webbing
4.Planation
The dichotomously branching system has shape similar to
1.U
2.R
3.Y
4.Fork
The first cell of the sporophyte generation is
1.Oospore
2.Spore mother cell
3.Spore
4.Gamete
The part of sporophyte which is called sporangium is
1.Capsule
2.Foot
3.Stalk
4.None of these
The simplest of all bryophytes are
1.Thallophytes
2.Embryophytes
3.Mosses
4.Liverworts
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
The zygote formed in liverworts is
1.Unicellular
2.Mulicellular
3.Multinucleate
4.None of these
Today the land habitat is dominated by
1.Fungi
2.Gymnosperms
3.Angiosperms
4.Tracheophytes
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
Which of the following help cyanobacteria to locomote?
1.Flagella
2.Gas vesicles
3.Both of these
4.None of these
Which of the following is an example of the living member of Psilopsida?
1.Rhynia
2.Psilophyton
3.Psilotum
4.Cooksonia
Which of the following of bryophytes are the simplest one?
1.Porella
2.Funaria
3.Anthocerus
4.Polytrichum
Which of the following plant group first formed true leaves?
1.Psilopsida
2.Lycopsida
3.Sphenopsida
4.Pteropsida
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
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.
Which of the following statement about plants is incorrect?
1.All are eukaryotes
2.They are multicellular.
3.Non-motile organisms
4.Are heterotrophes
Which of the following tracheophytes are also called arthrophytes?
1.Psilopsids
2.Lycopsids
3.Sphenopsids
4.Prteropsids
Which of the following tracheophytes are leafless?
1.Psilopsida
2.Lycopsida
3.Sphenopsida
4.Prteropsida
Who developed the vaccine against anthrax?
1.Louis Pasteur
2.Edward Jennar
3.Leuvenhoek
4.Alexander Fleming