Identify the incorrectly matched pairs:
I. Louis Pasteur: Gave the name virus
II. D. J Ivanowsky: Recognized the causal agents of mosaicism in tobacco to be larger than bacteria
III. M. W. Beijerinek: Contagium vivum fluidum
IV. W. M. Stanley: Discovered HIV
1. | I and III | 2. | I and II |
3. | III and IV | 4. | II and IV |
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Which of the following is not a characteristic of dinoflagellates?
1. | Mostly fresh water and photosynthetic |
2. | Cell wall with stiff cellulosic plates |
3. | Two flagella |
4. | Various colored pigments in the cell |
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Asexual reproduction in fungi takes place by:
1. | Fragmentation | 2. | Fission |
3. | Budding | 4. | Spores |
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The chief producers in the oceans are:
1. | Floating hydrophytes | 2. | Blue green algae |
3. | Desmids | 4. | Diatoms |
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Deuteromycetes are also called as Fungi imperfecti because:
1. They do not have a thalloid body
2. They can contain chlorophyll
3. There are no parasitic members
4. Sexual phases are not known
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A ‘dikaryon’ stage is seen in the members of:
1. Ascomycetes and Phycomycetes
2. Ascomycetes and Basidiomycetes
3. Basidiomycetes and Phycomycetes
4. Basidiomycetes and Deuteromycetes
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Alternaria, Colletotrichum and Trichoderma belong to the class:
1. | Phycomycetes | 2. | Ascomycetes |
3. | Basidiomycetes | 4. | Deuteromycetes |
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In general, the viruses that infect plants have:
1. | Single stranded RNA | 2. | Single stranded DNA |
3. | Double stranded RNA | 4. | Double stranded DNA |
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The basis of classification for the division of Kingdom Fungi into various classes includes all the following except:
1. Morphology of the mycelium
2. Mode of spore formation
3. Types of pigments present
4. Fruiting bodies
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Which of the following viruses has both DNA and RNA as its genetic material?
1. | Retroviruses | 2. | Bacteriophages |
3. | Plant viruses | 4. | None |
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