There exists a close association between the alga and the fungus within a lichen. The fungus:
1. | Provides food for the alga |
2. | Provides protection, anchorage and absorption for the alga |
3. | Fixes the atmospheric nitrogen for the alga |
4. | Releases oxygen for the alga |
Barophilic prokaryotes:
1. | Grow slowly in highly alkaline frozen lakes at high altitudes |
2. | Grow and multiply in very deep marine sediments |
3. | Readily grow and divide in seawater enriched in any soluble salt of barium |
4. | Occur in water containing high concentrations of barium hydroxide |
What is correct for the stages of Puccinia:
1. Telia and aecia on wheat
2. Telia and uredo stage on wheat
3. Telia and aecia on barberry
4. None
According to five kingdom system, blue green algae belongs to:
1. Metaphyta
2. Monera
3. Protista
4. Algae
Which of the following survives a temperature of 104 to ?
1. Marine Archaebacteria
2. Hot water spring thermophiles
3. Seeds of angiosperms
4. Eubacteria
Lichens are a well-known combination of an alga and a fungus where the fungus has:
1. An epiphytic relationship with the alga
2. A parasitic relationship with the alga
3. A symbiotic relationship with the alga
4. A saprophytic relationship with the alga
Koch's postulates are not applicable to:
1. Mycobacterium leprae
2. Tuberculosis
3. Pneumonia
4. Cholera
Diatomaceous earth is used as a heat insulator in boilers and steam pipes because the cell wall of diatom is
1. Composed of iron
2. Composed of silicon dioxide
3. a good conductor of heat
4. a bad conductor of electricity
Enzymes are not found in:
1. Fungi
2. Algae
3. Virus
4. Cyanobacteria
Virus are living, because:
1. They multiply in host cells
2. Carry anaerobic respiration
3. Carry metabolic activity
4. Cause infection