1. | a free RNA lacking a protein coat |
2. | a nucleocapsid |
3. | an abnormally folded protein |
4. | a ribozyme |
1. | Coccus | Spherical |
2. | Bacillus | Rod-shaped |
3. | Vibrium | Icosahedron |
4. | Spirillum | Spiral |
1. | Majority of them are marine water organisms found in running water. |
2. | The cell wall has stiff cellulose plates on the outer surface. |
3. | They have only one flagellum. |
4. | Though they are photosynthetic in the presence of sunlight, when deprived of sunlight they behave like heterotrophs. |
1. | Heterotrophic mode of nutrition |
2. | Sexual stage is unknown |
3. | Lack of vegetative reproduction |
4. | Called as bracket fungi |
Column I [Protist] |
Column II [Feature of wall] |
||
A | Diatoms | P | Cell wall has stiff cellulose plates on outer surface |
B | Dinoflagellates | Q | Cell wall embedded with silica |
C | Euglenoids | R | Protein rich layer instead of a cell wall |
D | Slime moulds | S | True walls in spores |
A | B | C | D | |
1. | Q | P | R | S |
2. | Q | P | S | R |
3. | P | Q | R | S |
4. | P | Q | S | R |
Column I [Fungal class] |
Column II [Example] |
||
A | Phycomycetes | P | Alternaria |
B | Ascomycetes | Q | Smut fungus |
C | Basidiomycetes | R | Bread mould |
D | Deuteromycetes | S | Truffles |
A | B | C | D | |
1. | Q | P | R | S |
2. | S | R | P | Q |
3. | R | Q | S | P |
4. | R | S | Q | P |
1. | Kingdom Monera | 2. | Kingdom Protista |
3. | Kingdom Fungi | 4. | Kingdom Plantae |
1. | They have chlorophyll a (similar to green plants) |
2. | They are unicellular and never colonial or filamentous |
3. | They often form blooms in polluted water bodies |
4. | Some of them can fix atmospheric nitrogen |
The chief ‘producers’ in the oceans are:
1. Cyanobacteria
2. Dinoflagellates
3. Diatoms
4. Lichens