Which of the following are most suitable indicators of SO₂ pollution in the environment?
1. Lichens
2. Conifers
3. Algae
4. Fungi

Which one of the following matches is correct? 

The guts of a cow and a buffalo possess:

1. Fucus sp
2. Chlorella sp
3. methanogens
4. cyanobacteria

Five kingdom system of classification suggested by R.H. Whittaker is based on:

1. Complexity of body organisation

2. Mode of reproduction

3. Mode of nutrition

4. All of the above

Archaebacteria differ from eubacteria in:

Which of the following shows coiled RNA strand and capsomeres?

Viruses have:
1. DNA enclosed in a protein coat
2. Prokaryotic nucleus
3. Single chromosome
4. Both DNA and RNA

A location with luxuriant growth of lichens on the trees indicates that the:

1. Trees are very healthy

2. Trees are heavily infested

3. Location is highly polluted

4. Location is not polluted

Which one of the following living organisms completely lacks a cell wall?

1. Cyanobacteria

2. Sea- fan (Gorgonia)

3. Saccharomyces

4. Coelenterata algae

The motile bacteria are able to move by:

1. fimbriae

2. flagella

3. cilia

4. pili