After forest fire which plants are the first to appear
1.ferns
2.bryophytes
3.grass
4.all of these
Posted Date:-2021-08-18 06:42:10
Agar, which is the solidifying agent in many bacterial culture media, is part of the cell wall of
1.pyrrophyta
2.Chrysophyta
3.chlorophyta
4.rhodophyta
Posted Date:-2021-08-18 06:42:10
Algae have cell wall made up of
1.pectins, cellulose and proteins
2.cellulose, hemicellulose and pectins
3.chitin
4.cellulose, galactans and mannans
Posted Date:-2021-08-18 06:42:10
All algae possess
1.nuclei
2.chloroplasts
3.both a and b
4.none of these
Posted Date:-2021-08-18 06:42:10
All of the following cellular structures are functionally important in cells of the gametophytes of both angiosperms and gymnosperms, except
1.haploid nuclei
2.mitochondria
3.cell wall
4.chloroplast
Posted Date:-2021-08-18 06:42:10
An ecosystem must have a continuous external source of
1.energy
2.food
3.minerals
4.all of these
Posted Date:-2021-08-18 06:42:10
Biotic potential is counteracted by
1.competition with other organisms
2.producer is the largest
3.limitation of food supply
4.none of these
Posted Date:-2021-08-18 06:42:10
Cell elongation in the internodal region of green plants takes place due to
1.ethylene
2.cytokinins
3.gibberellins
4.indole acetic acid
Posted Date:-2021-08-18 06:42:10
Chemical reactions could have converted simple organic compounds into ______ for the origin of life.
1.micromolecules
2.macromolecules
3.nitrogen, oxygen and other gases
4.cells
Posted Date:-2021-08-18 06:42:10
Chlamydomonas and Volvox are similar because
1.they both are motile
2.they are members of the Chlorophyta
3.both (a) and (b)
4.none of these
Posted Date:-2021-08-18 06:42:10
Coacervates were experimentally produced by
1.Fischer and Huxley
2.Sidney Fox and Oparin
3.Urey and Miller
4.Jacob and Monod
Posted Date:-2021-08-18 06:42:10
Dichlorophenyl dimethyl urea (DCMU)
1.inhibits oxygen evolution and non-cyclic photophosphorylation
2.promotes oxygen evolution and non-cyclic photophosphorylation
3.both
4.none of these
Posted Date:-2021-08-18 06:42:10
Diversification in plant life appeared
1.due to abrupt mutations
2.suddenly on earth
3.by seed dispersal
4.due to long periods of evolutionary changes
Posted Date:-2021-08-18 06:42:10
During World War II which Bryophyta was used in surgical dressing
1.sphagnum
2.funaria
3.pteris
4.riccia
Posted Date:-2021-08-18 06:42:10
Elaters of Marchantia are
1.haploid
2.diploid
3.triploid
4.polyploid
Posted Date:-2021-08-18 06:42:10
Fern plants are
1.hydrophytes
2.amphibious
3.hygrophytes
4.mesophytes
Posted Date:-2021-08-18 06:42:10
Flowering dependent on cold treatment is
1.cryotherapy
2.vernalization
3.cryogenics
4.none of these
Posted Date:-2021-08-18 06:42:10
Homologous organs indicate the
1.convergent evolution
2.parallel evolution
3.common descendent
4.natural selection
Posted Date:-2021-08-18 06:42:10
Horsetail is the common name of
1.equisetum
2.marchantia
3.marselia
4.pteris
Posted Date:-2021-08-18 06:42:10
In addition to seeds, which of the following characteristics are unique to the seed-producing plants
1.sporopollenin
2.lignin present in cell walls
3.pollen
4.megaphylls
Posted Date:-2021-08-18 06:42:10
In DNA, the adenine normally pairs with
1.cytosine
2.guanine
3.Thymine
4.uracil
Posted Date:-2021-08-18 06:42:10
In Funaria stomata are found on
1.theca
2.leaf
3.apophysis
4.stem
Posted Date:-2021-08-18 06:42:10
In seed plants, which part of a pollen grain has a function most like that of the seed coat
1.sporopollenin
2.male gametophyte
3.sporophyll
4.stigma
Posted Date:-2021-08-18 06:42:10
Microfilaments are composed mainly of a protein called
1.actin
2.tubulin
3.myosin
4.chitin
Posted Date:-2021-08-18 06:42:10
Monohybrid ratio is
1.9:3:3:1
2. 9:1
3. 9:3:1
4.3:1
Posted Date:-2021-08-18 06:42:10
Rubisco content of choroplast is
1.20%
2.16%
3.25%
4.50%
Posted Date:-2021-08-18 06:42:10
Saprophytic fungi
1.engulf their food in order to break it down
2.secure their food from dead organic materials
3.both (a) and (b)
4.none of these
Posted Date:-2021-08-18 06:42:10
Semiautonomous organelle in the cell is
1.chloroplast
2.vacuole
3.peroxisomes
4.endoplasmic reticulum
Posted Date:-2021-08-18 06:42:10
Smooth endoplasmic reticulum is the site of
1.protein synthesis
2.carbohydrate synthesis
3.amino acid synthesis
4.lipid synthesis
Posted Date:-2021-08-18 06:42:10
Species that occur in different geographical regions separated by special barrier are
1.allopatric
2.sympatric
3.sibling
4.none of these
Posted Date:-2021-08-18 06:42:10
Synecology deals with
1.ecology of many species
2.ecology of many populations
3.ecology of community
4.none of the above
Posted Date:-2021-08-18 06:42:10
The amount of phagocytosis done by the Plasmodium
1.is greater than by the water mold mycelium
2.is lesser than by the water mold mycelium
3.is equal to by the water mold mycelium
4.none of the these
Posted Date:-2021-08-18 06:42:10
The experimental material garden pea used by Mendel is
1.cross fertilized crop
2.both self and cross fertilized
3.self fertilized crop
4.may vary with ecotype
Posted Date:-2021-08-18 06:42:10
The lower Bryophytes are usually termed as
1.mosses
2.liverworts
3.sporophytes
4.ferns
Posted Date:-2021-08-18 06:42:10
The main function of centrosome is
1.secretion
2.osmoregulation
3.protein synthesis
4.formation of spindle fiber
Posted Date:-2021-08-18 06:42:10
The main way that pine trees disperse their offspring is by using
1.fruits that are eaten by animals
2.wind blown seeds
3.squirrels to bury cones
4.spores
Posted Date:-2021-08-18 06:42:10
The number of spores produced in fern sporangium is
1.32
2.16
3.72
4.64
Posted Date:-2021-08-18 06:42:10
The pyramid of energy in any ecosystem is
1.always upright
2.may be upright or invented
3.always inverted
4.none of these
Posted Date:-2021-08-18 06:42:10
When alleles of two contrasting characters are present together, one of the character express and the other remains hidden.This is the
1.law of purity of gametes
2.law of segregation
3.law of independent assortment
4.law of dominance
Posted Date:-2021-08-18 06:42:10
Which algal division is divided up into three main groups consisting of the golden-brown algae, the yellow-green algae and the diatoms?
1.chlorophyta
2.chrysophyta
3.phaeophyta
4.pyyrophyta
Posted Date:-2021-08-18 06:42:10
Which algal division never produces motile, flagellated cells among any of its members
1.chlorophyta
2.rhodophyta
3.chrysophyta
4.phaeophyta
Posted Date:-2021-08-18 06:42:10
Which fern yields antihelminthic drug
1.adiantum
2.pteris
3.salvinia
4.dryopteris
Posted Date:-2021-08-18 06:42:10
Which is wrong in respect to bryophytes
1.water is essential for fertilization
2.presence of archegonia
3.presence of ciliated sperms
4.presence of autotrophic independent sporophyte
Posted Date:-2021-08-18 06:42:10
Which of the following does not represent a human disease caused by fungi
1.ring worm
2.cryptococcosis
3.malaria
4.jock itch
Posted Date:-2021-08-18 06:42:10
Which of the following is associated with the structure of Golgi complex
1.cristae
2.cisternae
3.tonoplast
4.none of these
Posted Date:-2021-08-18 06:42:10
Which of the following statements are true regarding law of segregation
1.alleles separate with each other during gametogenesis
2.the segregation of factors is due to the segregation of chromosomes during meiosis
3.law of segregation is called as law of purity of gametes
4.all of the above
Posted Date:-2021-08-18 06:42:10
Which of these is most important in making the typical seed more resistant to adverse conditions than the typical spore
1.a different type of sporopollenin
2.an internal reservoir of liquid water
3.integuments
4.ability to be dispersed
Posted Date:-2021-08-18 06:42:10
Which of these spores are characteristic of the black bread mold Rhizopus
1.ascospore and zygospore
2.arthrospore and blastospore
3.sporangiospore and zygospore
4.arthrospore and ascospore
Posted Date:-2021-08-18 06:42:10
Which spore is on a club and results from the fusion of two nuclei from different strains of the same fungi?
1.blastospore
2.ascospore
3.basidiospore
4.conidiospore
Posted Date:-2021-08-18 06:42:10
__________ produce basidiospores
1.slime molds
2.dimorphic fungi
3.club fungi
4.sac fungi
Posted Date:-2021-08-18 06:42:10