CBSE Class 11 (Science) Biological Classification — practice questions
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Practice CBSE Class 11 (Science) Biological Classification in the app →The five-kingdom classification was proposed by:Bacteria belong to which kingdom under Whittaker's classification?In the five-kingdom system, organisms with cell wall composed of CHITIN belong to which kingdom?Identify the bacterium responsible for the production of methane in the gut of ruminants like cows and buffaloDiatoms are placed under Kingdom Protista group:Red tides in the sea are caused by rapid multiplication of:Mycoplasma are distinguished by:The Five Kingdom Classification was proposed in 1969 by:How many kingdoms did Whittaker recognise?Which kingdom holds all the prokaryotes?Bacteria are grouped into how many categories by shape?The comma shaped bacterium is called a:Bacteria as a group are noted for the most extensive:Bacteria that live in extremely salty places are called:Archaebacteria of hot springs are known as:Methane in the gut of cattle is produced by:Blue green algae are more correctly called:Nitrogen is fixed in cyanobacteria inside specialised cells called:Chemosynthetic autotrophic bacteria get their energy by oxidising:Which disease is caused by a bacterium?Bacteria reproduce mainly by:Which organisms completely lack a cell wall?Kingdom Protista holds all eukaryotes that are:The cell wall of a diatom is embedded with:The heaped up cell walls of dead diatoms make up:The chief producers in the oceans are the:Red tides in the sea are caused by rapid growth of:Instead of a cell wall a euglenoid has a protein rich:Deprived of sunlight euglenoids behave like:Slime moulds obtain food in which way?The aggregation formed by a slime mould is called a:Amoeboid protozoans capture their prey using:Sleeping sickness is caused by which flagellated protozoan?The cavity through which Paramoecium takes in food is the:Malaria is caused by which sporozoan?Which fungus is unicellular?The network of thread like filaments in a fungus is the:Hyphae that are continuous tubes with many nuclei are called:The cell wall of a fungus is built mainly of:Fungi living in association with algae form:Fusion of protoplasms of two gametes in a fungus is:Fusion of two nuclei in the fungal sexual cycle is:The stage with two nuclei in one cell is called a:Which class of fungi has an aseptate coenocytic mycelium?Ascomycetes are commonly known as:Which fungus is used widely in biochemical and genetic work?Mushrooms, bracket fungi and puffballs belong to:How many basidiospores form on a single basidium?Deuteromycetes are called imperfect fungi because they lack a known:Insectivorous plants such as the Venus fly trap are:The alternation of haploid and diploid phases in plants is called:Animals store their food reserve as:The mode of nutrition of animals is described as:Who first recognised the microbe of tobacco mosaic disease?Who showed that viruses could be crystallised?The genetic material of a virus can be:Viruses that infect plants usually carry:The protein coat that protects viral nucleic acid is the:A viroid differs from a virus in having no:Mad cow disease is caused by an agent called a:A lichen is a partnership between a fungus and an:Lichens are useful because they act as indicators of:Biological classification was first proposed by:Which specialised cells let Nostoc and Anabaena fix atmospheric nitrogen?Which group of organisms completely lacks a cell wall and is the smallest living cell known?The cell walls of diatoms are indestructible because they are embedded with which substance?Diatomaceous earth, the gritty deposit of diatom walls, is used for what purpose?Rapid multiplication of which protists turns sea water red and can kill fish with their toxins?What forms the stiff plates on the outer surface of the dinoflagellate cell wall?What replaces the cell wall in Euglena, making its body flexible?What is the flagellar makeup of euglenoids?How do euglenoids obtain food when kept in the dark?How do the resistant spores of slime moulds get dispersed?What is the common mode of life of all protozoans?Marine amoeboid protozoans have which kind of covering on their surface?The sleeping sickness parasite Trypanosoma belongs to which protozoan group?Which feature of Paramoecium opens to the outside and receives food-laden water steered by cilia?Which sporozoan is the most notorious, causing malaria in humans?In the sexual cycle of fungi, fusion of the protoplasms of two gametes is known as what?Which step of the fungal sexual cycle is the fusion of two nuclei?What is the intervening stage with two nuclei per cell (n + n) in ascomycetes and basidiomycetes called?Which feature describes the mycelium of phycomycetes?Which fungus causes the white spots seen on mustard leaves?Which spores are produced endogenously in the asci of ascomycetes?On which structure are the asexual conidia of ascomycetes produced exogenously?Morels and truffles, edible delicacies, belong to which fungal class?How many basidiospores are produced on a basidium after karyogamy and meiosis?What are the fruiting bodies bearing basidia in mushrooms and puffballs called?Why are deuteromycetes commonly called imperfect fungi?Which spores are the only reproductive spores of deuteromycetes?Which of these is a parasitic plant, unlike bladderwort and Venus fly trap?Alternating haploid and diploid plant phases are termed what?Which term describes the animal mode of nutrition by ingestion of food?Who recognised in 1892 that microbes smaller than bacteria caused mosaic disease of tobacco?What term did Beijerinck use for the infectious fluid from diseased tobacco plants?Which scientist discovered viroids in 1971 through potato spindle tuber disease?What feature of viroids separates them from viruses?Bacteriophages are usually which type of virus?The protective capsid of a virus is made of small subunits known as what?What type of genetic material do most viruses infecting plants have?