Q. No.Which of the following statements is correct?
1. Organisms that depend on living plants are called saprophytes.
2. Some of the organisms can fix atmospheric nitrogen in specialized cells called sheath cells.
3. The fusion of two cells is called Karyogamy.
4. Fusion of protoplasms between two motile on non-motile gametes is called plasmogamy.
1. Organisms that depend on living plants are called saprophytes.
2. Some of the organisms can fix atmospheric nitrogen in specialized cells called sheath cells.
3. The fusion of two cells is called Karyogamy.
4. Fusion of protoplasms between two motile on non-motile gametes is called plasmogamy.
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In which kingdom would you classify the archaea and nitrogen-fixing organism, if the five-kingdom system of classification is used?
| 1. | Plantae | 2. | Fungi |
| 3. | Protista | 4. | Monera |
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Which disease of man is similar to cattle's, bovine spongiform encephalopathy:
| 1. | Encephalitis | 2. | Jacob-Creutzfeldt disease |
| 3. | Spongiocitis of cerebrum | 4. | Spondylitis |
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Identify the incorrect statement regarding viruses:
| 1. | A virus is a nucleoprotein and the genetic material is infectious |
| 2. | Retroviruses contain both RNA and DNA |
| 3. | Viruses are obligate cellular endoparasites |
| 4. | Viruses can be crystallized and this was first shown by W. M Stanley |
Diatomaceous earth is used as heat insulator in boilers and steam pipes because the cell wall of diatom is:
| 1. | composed of iron | 2. | composed of silicon dioxide |
| 3. | conductor of heat | 4. | bad conductor of electricity |
The thalloid body of a slime mould (Myxomycetes) is known as:
| 1. | protonema | 2. | Plasmodium |
| 3. | fruiting body | 4. | mycelium |
In which group of organisms the cell walls form two thin overlapping shells which fit together?
| 1. | Chrysophytes | 2. | Euglenoids |
| 3. | Dinoflagellates | 4. | Slime moulds |
Which of the following organisms are known as chief producers in the oceans?
| 1. | Dinoflagellates | 2. | Diatoms |
| 3. | Cyanobacteria | 4. | Euglenoids |
Select the wrong statement:
1. Cell wall is present in members of Fungi and Plantae
2. Mushrooms belong to Basidiomycetes
3. Pseudopodia are locomotory and feeding structures in Sporozoans
4. Mitochondria are the powerhouse of the cell in all kingdoms except monera
How many organisms in the list given below are autotrophs ?
Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Sacharomyces, Trypanosoma, Porphyra, Wolfia
| 1. | Five | 2. | Six |
| 3. | Three | 4. | Four |
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