How are viroids different from viruses?
|
Viruses |
Viriods |
|
1. Larger in size. |
1. Smaller in size. |
|
2. Have protein coat. |
2. Lack protein coat. |
|
3. RNA of higher molecular weight. |
3. RNA of low molecular weight. |
|
4. May have DNA or RNA. |
4. Only RNA is present. |
Find out what do the terms ‘algal bloom’ and ‘red-tides’ signify.
State two economically important uses of:
(a) Heterotrophic bacteria
(b) Archaebacteria
Discuss how classification systems have undergone several changes over a period of time?
What is the nature of cell-walls in diatoms?
