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question_answer1) Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion : Heterotrichous filaments are more advanced than branched filaments. Reason : Heterotrichous filaments have prostrate and projecting system.
question_answer2) Assertion : Bryophytes and tracheophytes have an embryo stage in their life cycle. Reason : Embryophyta are terrestrial plants.
question_answer3) Assertion : Algae is a collective term for all those chlorophyll bearing organisms which are thalloid. Reason : Presently algae are grouped in three kingdom.
question_answer4) Assertion : Algae and fungi are grouped in thallophyta. Reason : Algae and fungi show no differentiation in thallus.
question_answer5) Assertion : Each group of algae has a characteristic colour. Reason : Each group of algae show predominance of one pigment.
question_answer6) Assertion : Only red algae are able to flourish at the great depth of sea. Reason : Red algae has the pigments r-phycoerythrin and r-phycocyanin.
question_answer7) Assertion : Spermatangium of red algae bears trichogyne. Reason : Trichogyne helps in reproduction.
question_answer8) Assertion : Spirogyra is slippery in touch. Reason : Spirogyra consists a gelatinous sheath.
question_answer9) Assertion : Isogamy is a primitive type of sexual reproduction. Reason : The gametes are of different sizes.
question_answer10) Assertion : Spirogyra shows anisogamy. Reason : Gametes are identified on the basis of their motility.
question_answer11) Assertion : Meiospores form genetically and functionally different progenies. Reason : Mitospores form progenies identical to parents.
question_answer12) Assertion : Pyrenoids are utilised during starvation. Reason : Pyrenoids are proteinaceous bodies.
question_answer13) Assertion : In green algae, the eye-spot is present in the cell. Reason : Eye-spot is meant for respiration.
question_answer14) Assertion : Chlorella could be utilised to keep the air in space vehicles. Reason : The space travellers feed on Chlorella soup.
question_answer15) Assertion : All the cells Ulothrix filament are alike. Reason : Ulothrix filament is unbranched.
question_answer16) Assertion : Zygospore of Ulothrix forms meiozoospores and meioaplanospores. Reason : Both are motile.
question_answer17) Assertion : Spirogyra shows haplontic life cycle. Reason : Zygotic meiosis occurs in Spirogyra.
question_answer18) Assertion : Red algae contribute in producing coral reef. Reason : Some red algae secrete and deposit calcium carbonate our their walls. [AIIMS 2004]
question_answer19) Assertion : The sex organs in the bryophytes are jacketed. Reason : Bryophytes are land plants.
question_answer20) Assertion : All bryophytes are land dwellers. Reason : Water is necessary to complete their life-cycle.
question_answer21) Assertion : The bryophytes exist in two phases - gametophyte and sporophyte. Reason : The sporophyte is nutritionally independent.
question_answer22) Assertion : Unlike thallophytes, bryophytes show formation of embryo. Reason : The embryo gives rise to gametophyte plant of bryophytes.
question_answer23) Assertion : Bryophytes possess archegonium as a female sex organ. Reason : Algae also possess the archegonium.
question_answer24) Assertion : The embryo of bryophyte is independent. Reason : The zygote of thallophyte is dependent.
question_answer25) Assertion : Liverworts fail to spread to a new locality through fragmentation. Reason : Gemmae are helpful in propagating liverworts in different locality.
question_answer26) Assertion : Riccia is many cells thick. Reason : Riccia has both assimilatory region and storage region.
question_answer27) Assertion : Sporogonium of Riccia is totally dependent on the gametophyte. Reason : Sporogonium of Marchantia is partly dependent on the gametophyte.
question_answer28) Assertion : The primary protonema of moss by death and decay of cells may break into fragments. Reason : Each fragment gives rise to leafy gametophyte.
question_answer29) Assertion : Paroicous mosses have both sex organs intermingled together. Reason : Autoicous mosses bear sex organs on different branches.
question_answer30) Assertion : Sperms of Riccia are biflagellate. Reason : Sperms show swimming nature.
question_answer31) Assertion : The sporogonium of Riccia is the simplest among the liverworts. Reason : Sporophyte consists of capsule only.
question_answer32) Assertion : The young stem of Funaria is photosynthetic. Reason : It contain hydroids.
question_answer33) Assertion : The growth of Funaria stem occurs by a single cell. Reason : It's position is apical.
question_answer34) Assertion : Funaria multiplied vegetatively by means of bulbils. Reason : Bulbils and tubers are two different structures.
question_answer35) Assertion : Gemmae formation in Funaria occurs in favourable condition. Reason : The gemmae form on the stem and leaves.
question_answer36) Assertion : Funaria is monoecious. Reason : Cross fertilization occurs in Funaria.
question_answer37) Assertion : Antheridia of Funaria are sunk in pit. Reason : Its antheridial cluster is surrounded by perigonial leaves.
question_answer38) Assertion : The peristome is a fringe of teeth-like projections found at the mouth of the capsule. Reason : It may be of two types nematodontous and orthodontus.
question_answer39) Assertion : Paraphyses are also called perigonial leaves. Reason : They are associated with the antheridia.
question_answer40) Assertion : The archegonia of Funaria are arranged into a terminal cluster. Reason : The archegonial cluster is surrounded by perigonial leaves.
question_answer41) Assertion : Mosses are used as pollution indicators. Reason : They absorb metals.
question_answer42) Assertion : Mosses are evolved from algae. Reason : Protonema of mosses is similar to some green algae. [AIIMS 2001]
question_answer43) Assertion : The sorus of pteridium is of coenosorus type. Reason : Pteridium lacks sori.
question_answer44) Assertion : Coenosorus lacks true indusium. Reason : Indusium covers sori.
question_answer45) Assertion : Ramenta are scales which cover young rhizome and leaves of Dryopteris. Reason : Pteridium lacks rementa.
question_answer46) Assertion : Indusium dries in mature sours and releases sporangia. Reason : Mature sporangium releases spores by the structures-annulus and stomium.
question_answer47) Assertion : Both bryophytes and pteridophytes contain well-developed antheridia. Reason : Biflagellate sperms are formed by their antheridia.
question_answer48) Assertion : Water is not required for fertilization process in ferns. Reason : Malic acid of archegonial neck attracts antherozoids.
question_answer49) Assertion : Sporophytes of pteridophyta are dominant individual. Reason : They do not show the formation of true root.
question_answer50) Assertion : Homosporous pteridophytes are exosporic. Reason : Heterosporous pteridophytes are endosporic.
question_answer51) Assertion : In leptosporangiate development, sporangia are formed from a group of initials. Reason : Eusporangiate development of sporangia starts from single initial.
question_answer52) Assertion : Adiantum caudatom is called walking fern. Reason : It can reproduce by its leaf tips.
question_answer53) Assertion : Gymnosperms seeds are naked. Reason : They lack ovary wall.
question_answer54) Assertion : Cycas has two types of root-tap root system and coralloid roots. Reason : Coralloid root contains Anabaena.
question_answer55) Assertion : Xylem of gymnosperms consists of tracheids and no vessels. Reason : Phloem of gymnosperms consists of phloem parenchyma, companion cells and sieve tubes.
question_answer56) Assertion : All living species of Cycas are dioecious. Reason : Cycas contains male and female cones on the same plant.
question_answer57) Assertion : The male of Cycas change in size when the microspores became mature. Reason : The microspores are dispersed by wind.
question_answer58) Assertion : The female cone of Cycas is not true cone. Reason : Its formation checks the growth of the stem.
question_answer59) Assertion : The interval between pollination and fertilization is about 4 months in Cycas. Reason : Cycas show retention of swimming sperm.
question_answer60) Assertion : Cycas embryo has many cotyledons. Reason : Compound suspensor is formed due to fusion of suspensors of proembryos.
question_answer61) Assertion : Pinus has a pyramidal appearance. Reason : The older parts of long shoot have scars of fallen dwarf shoots.
question_answer62) Assertion : In gymnosperms, plants show well-developed vessels and fibres. Reason : Companion cells are absent in gymnosperm.
question_answer63) Assertion : ?Upper Carboniferous? period is also called ?Age of Ferns?. Reason : Ferns dominated during the period.
question_answer64) Assertion : Pinus is heterosporous. Reason : Microspore and megaspore are present in them.
question_answer65) Assertion : The scale leaves on the long shoots are called cataphylls. Reason : Cataphylls lack mid rib.
question_answer66) Assertion : Pinus shows formation of annual rings. Reason : Pinus grows in area of environmental fluctuation.
question_answer67) Assertion : The mesophyll of Pinus shows no distinction as mesophyll and palisade. Reason : Parenchymatous cells are present in mesophyll of Pinus.
question_answer68) Assertion : Pinus is monoecious. Reason : Each sporophyll bears only one microsporangia.
question_answer69) Assertion : Male cone of Pinus is equivalent to stamens of angiosperms. Reason : Male cone bears pollen grains.
question_answer70) Assertion : The female cones are same in number as male cones. Reason : Male and female cones appears alternately on the same branch of the Pinus.
question_answer71) Assertion : The female cones take much time to mature. Reason : The seeds are shed when the cone is 22 months old.
question_answer72) Assertion : Pinus embryo has two cotyledons. Reason : Pinus shows polyembryony.
question_answer73) Assertion : Pinus displays the alternation of generations. Reason : The gametophyte is dependent upon the sporophyte phase.
question_answer74) Assertion : Cedrus deodara yields highly-valued timber. Reason : Cedrus deodara is resistant to pathogen attack.
question_answer75) Assertion : Pinus wood is used as fuel wood. Reason : Pinus wood can easily be ignited.
question_answer76) Assertion : In Pinus, pollination is anemophilous Reason : Pinus bear winged pollen grains.
question_answer77) Assertion : Angiosperms and gymnosperms both are flowering plants. Reason : Both form seeds.
question_answer78) Assertion : Angiosperms are most recent plants. Reason : Angiosperms lack archegonia.
question_answer79) Assertion : Double fertilization is unique to angiosperms. Reason : Triple fusion occurs in double fertilization.
question_answer80) Assertion : Angiosperm and Gymnosperms both are spermatophyta. Reason : Angiosperm and Gymnosperms both form triploid endosperm.
question_answer81) Assertion : Flower is aggregation of sporophylls. Reason : Sporophylls are modified in angiosperms.
question_answer82) Assertion : Fertilized ovule forms seed. Reason : Ripened ovary forms fruit.
question_answer83) Assertion : Angiosperms lack flagellate male gametes. Reason : Sperms are not dependent on water for fertilization.
question_answer84) Assertion : Angiosperms are mostly terrestrial. Reason : Angiosperms are found in plains only.
question_answer85) Assertion : Stamens are comparable to microsporophylls. Reason : Ovules are comparable to megasporophylls.
question_answer86) Assertion : More dicot species are known than that of monocot species. Reason : Two cotyledons are present in the dicot plants.
question_answer87) Assertion : Biennial plants flower in two year. Reason : The biennial plants live for two years.
question_answer88) Assertion : Angiosperms contain microsporophyll and megasporophyll. Reason : Microsporophyll and megasporophyll forms microspore and megaspore respectively.
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