Column I [Kingdom] |
Column II [Cell wall] |
||
A | Monera | P | Absent |
B | Fungi | Q | Chitinous |
C | Plantae | R | Polysaccharide + amino acid |
D | Animalia | S | Cellulosic |
A | B | C | D | |
1. | R | S | Q | P |
2. | R | Q | S | P |
3. | Q | S | R | P |
4. | P | Q | R | S |
Assertion (A): | Alternaria, Colletotrichum and Trichoderma are kept in the fungal class- deuteromycetes. |
Reason (R): | Asexual and vegetative phases in the life cycle of these fungi are not known. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |
Group of protozoans | Example | ||
A. | Amoeboid | P. | Entamoeba |
B. | Flagellated | Q. | Paramecium |
C. | Ciliated | R. | Trypanosoma |
D. | Sporozoan | S. | Plasmodium |
A | B | C | D | |
1. | Q | S | P | R |
2. | S | Q | R | P |
3. | P | R | Q | S |
4. | R | P | S | Q |
1. | They are most abundant bacteria in nature |
2. | Many of them are important decomposers |
3. | They play a great role in recycling nutrients like nitrogen, phosphorus, iron and sulphur |
4. | They are helpful in making curd from milk, production of antibiotics, fixing nitrogen in legume roots, etc. |
Organism | Nature of cell wall | |
1. | True bacterium | Polysaccharide + Amino acid |
2. | Fungus | With chitin |
3. | Euglenoids | Cellulosic |
4. | Diatoms | Embedded with silica |
I. | He studied the tobacco mosaic virus. |
II. | He succeeded in extracting the virus in the form of pure crystals in 1935. |
III. | He was able to show that the tobacco mosaic virus is composed of protein and RNA. |
1. | D. J. Ivanovsky | 2. | W. M. Stanley |
3. | M. W. Beijerinck | 4. | Louis Pasteur |
1. | The two overlapping shells of cell wall fit together as in a soap box. |
2. | They are the chief ‘producers’ in the oceans. |
3. | Their cell walls are embedded with silica. |
4. | Diatoms behave like heterotrophs when deprived of sunlight. |
1. | Large number of members of deuteromycetes are decomposers of litter and help in mineral cycling |
2. | Sex organs are absent in basidiomycetes but plasmogamy is brought about by fusion of the nuclei of the gametes |
3. | The asexual spores produced by ascomycetes are conidia, produced exogenously on the special mycelium called conidiophores |
4. | In ascomycetes and basidiomycetes, an intervening dikaryon stage exists before the fusion of parental nuclei |
Column I | Column II | ||
A | Amoeboid | P | They have a cavity (gullet) that opens to the outside of the cell surface into which water laden food is steered |
B | Flagellated | Q | Marine forms have silica shells on their surface |
C | Ciliated | R | The parasitic forms cause diseases such as sleeping sickness |
D | Sporozoans | S | They have an infectious spore-like stage in their life cycles |
A | B | C | D | |
1 | R | Q | P | S |
2 | Q | R | P | S |
3 | Q | R | S | P |
4 | S | Q | R | P |