Q. In which group of organisms the cell walls form two thin overlapping shells which fit together? EuglenoidsDinoflagellatesSlime mouldsChrysophytes Answer: Chrysophytes

Q. The structures that help some bacteria to attach to rocks and /or host tissues are: FimbriaeMesosomesHoldfastRhizoids Answer: Fimbriae

Q. The motile bacteria can move by: FimbriaeFlagellaCiliaPili Answer: Flagella

Q. Which of the following structures is not found in a prokaryotic cell? RibosomeMesosomePlasma membraneNuclear envelope Answer: Nuclear envelope

Q. Which of the following shows coiled RNA strand and capsomeres? PoliovirusTobacco mosaic virusMeasles virusRetrovirus Answer: Tobacco mosaic virus

Q. Archaebacteria differ from eubacteria in: Cell membraneMode of nutritionCell shapeMode of reproduction Answer: Cell shape

Q. Which of the following are likely to be present in deep seawater? EubacteriaBlue-green algaeSaprophytic fungiArchaebacteria Answer: Archaebacteria

Q. Satellite RNAs are present in some Plant virusesViroidsPrionsBacteriophages Answer: Plant viruses

Q. Five kingdom system of classification suggested by R.H. Whittaker is NOT based on: Presence or absence of a well-defined nucleusMode of reproductionMode of nutritionComplexity of body organization Answer: Presence or absence of a well-defined nucleus

Q. Specialized cells for fixing atmospheric nitrogen in Nostoc are AkinetesHeterocystsHormogoniaNodules Answer: Heterocysts

Q. The asexual spores are not found, vegetative reproduction occurs by fragmentation and sexual organs are absent. Identify the class of fungi. PhycomycetesAscomycetesBasidiomycetesDeuteromycetes Answer: Basidiomycetes

Q. Which amongst kingdom animalia has become recently extinct? snow leopardindian macaquecheetahtiger Answer: cheetah