Which of the following is incorrect about Cyanobacteria?
1. They are photoautotrophs
2. They lack heterocysts
3. They often form blooms in polluted water bodies
4. They have chlorophyll similar to green plants
Members of Phycomycetes are found in
(i) Aquatic habitats
(ii) On decaying wood
(iii) Moist and damp places
(iv) As obligate parasites on plants
Choose from the following options.
1. (i) and (iv)
2. (ii) and (iii)
3. All of these
4. None of these
With respect to fungal sexual cycle, choose the correct sequence of events.
1. Karyogamy, Plasmogamy and Meiosis
2. Meiosis, Plasmogamy and Karyogamy
3. Plasmogamy, Karyogamy and Meiosis
4. Meiosis, Karyogamy and Plasmogamy
The difference between virus and viroid is
1. | absence of protein coat in viroid, but present in the virus. |
2. | presence of low molecular weight RNA in virus, but absent in viroid, |
3. | Both 1 and 2 |
4. | None of the above |
Select the correct match
1. Imperfect fungi – Ustilago
2. Agaricus – Club fungus
3. Toadstool – Edible mushroom
4. Smut of wheat – Puccinia graminis
Match the columns.
Column I | Column II |
(a) Prion (b) Bacteriophage (c) Plasmid (d) Virus |
(p) Nucleic acid + Protein (q) Infectious protein (r) Bacterial DNA (s) Infect bacteria |
Select correct option
1. a-p, b-q, c-r, d-s
2. a-s, b-r, c-q, d-p
3. a-q, b-s, c-r, d-p
4. a-q, b-s, c-p, d-r
Animals differ from plants in
1. Being multicellular
2. Having cell wall
3. Being heterotrophic
4. Being eukaryotic
The imperfect fungi such as Trichoderma
1. Reproduce sexually by spore formation
2. Have aseptate mycelium
3. Reproduce asexually by conidia formation
4. Have coenocytic mycelium
The cell wall is impregnated with silica to form transparent siliceous shell in
1. Dinoflagellates
2. Euglenoids
3. Diatoms
4. Slime moulds
Find the odd one with respect to the fungi imperfecti
1. Alternaria
2. Colletotrichum
3. Trichoderma
4. Penicillium