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CBSE Class 11 (Science) The Living World & Biological Classification — practice questions — page 8

Explore 242 free The Living World & Biological Classification questions in CBSE Class 11 (Science) Biology. Open each question or exercise to read its content, reference answers and available explanation.

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The Living World & Biological Classification questions and exercises with answers

Showing questions 211–240 of 242.

How do the resistant spores of slime moulds get dispersed?Read the answer and worked solution →What is the common mode of life of all protozoans?Read the answer and worked solution →Marine amoeboid protozoans have which kind of covering on their surface?Read the answer and worked solution →The sleeping sickness parasite Trypanosoma belongs to which protozoan group?Read the answer and worked solution →Which feature of Paramoecium opens to the outside and receives food-laden water steered by cilia?Read the answer and worked solution →Which sporozoan is the most notorious, causing malaria in humans?Read the answer and worked solution →In the sexual cycle of fungi, fusion of the protoplasms of two gametes is known as what?Read the answer and worked solution →Which step of the fungal sexual cycle is the fusion of two nuclei?Read the answer and worked solution →What is the intervening stage with two nuclei per cell (n + n) in ascomycetes and basidiomycetes called?Read the answer and worked solution →Which feature describes the mycelium of phycomycetes?Read the answer and worked solution →Which fungus causes the white spots seen on mustard leaves?Read the answer and worked solution →Which spores are produced endogenously in the asci of ascomycetes?Read the answer and worked solution →On which structure are the asexual conidia of ascomycetes produced exogenously?Read the answer and worked solution →Morels and truffles, edible delicacies, belong to which fungal class?Read the answer and worked solution →How many basidiospores are produced on a basidium after karyogamy and meiosis?Read the answer and worked solution →What are the fruiting bodies bearing basidia in mushrooms and puffballs called?Read the answer and worked solution →Why are deuteromycetes commonly called imperfect fungi?Read the answer and worked solution →Which spores are the only reproductive spores of deuteromycetes?Read the answer and worked solution →Which of these is a parasitic plant, unlike bladderwort and Venus fly trap?Read the answer and worked solution →Alternating haploid and diploid plant phases are termed what?Read the answer and worked solution →Which term describes the animal mode of nutrition by ingestion of food?Read the answer and worked solution →Who recognised in 1892 that microbes smaller than bacteria caused mosaic disease of tobacco?Read the answer and worked solution →What term did Beijerinck use for the infectious fluid from diseased tobacco plants?Read the answer and worked solution →Which scientist discovered viroids in 1971 through potato spindle tuber disease?Read the answer and worked solution →What feature of viroids separates them from viruses?Read the answer and worked solution →Bacteriophages are usually which type of virus?Read the answer and worked solution →The protective capsid of a virus is made of small subunits known as what?Read the answer and worked solution →What type of genetic material do most viruses infecting plants have?Read the answer and worked solution →Match each taxonomic category with its hierarchical rank:Read the answer and worked solution →Match each taxonomical aid with its specific descriptive feature:Read the answer and worked solution →

Worked practice questions

How do the resistant spores of slime moulds get dispersed?

  1. By water currents
  2. By insect legs
  3. By air currents
  4. By animal fur
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Correct answer: C. By air currents

Spores borne on fruiting body tips are light and are carried away by air currents.

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What is the common mode of life of all protozoans?

  1. Photosynthetic producers
  2. Chemosynthetic autotrophs
  3. Saprophytic decomposers
  4. Predators or parasites
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Correct answer: D. Predators or parasites

Protozoans are heterotrophs, living either as predators or as parasites.

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Marine amoeboid protozoans have which kind of covering on their surface?

  1. Silica shells
  2. Cellulose plates
  3. Chitin walls
  4. Gelatinous sheaths
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Correct answer: A. Silica shells

Marine amoeboid forms secrete shells of silica on their surface.

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