Biological Classification

The imperfect fungi which are decomposers of litter and help in mineral cycling belong to

1. Ascomycetes
2. Phycomycetes
3. Basidiomycetes
4. Deuteromycetes

True nucleus is absent in

1. Vaucheria
2. Volvox
3. Anabaena
4. Mucor.

Which one of the following matches is correct?

1. Mucor – Reproduction by conjugation – Ascomycetes
2. Agaricus – Parasitic fungus – Basidiomycetes
3. Phytophthora – Aseptate mycelium – Basidiomycetes
4. Alternaria – Sexual reproduction absent – Deuteromycetes

Five kingdom system of classification suggested by R.H. Whittaker is not based on

1. presence or absence of a well defined nucleus
2. mode of reproduction
3. mode of nutrition
4. complexity of body organisation.

Which of the following shows coiled RNA strand and capsomeres?

1. Polio virus
2. Tobacco mosaic virus
3. Measles virus
4. Retrovirus

Viruses have

1. DNA enclosed in a protein coat
2. prokaryotic nucleus
3. single chromosome
4. both DNA and RNA.

Archaebacteria differ from eubacteria in

1. cell membrane structure
2. mode of nutrition
3. cell shape
4. mode of reproduction.

Anoxygenic photosynthesis is characteristic of

1. Rhodospirillum
2. Spirogyra
3. Chlamydomonas
4. Ulva.

Which one of the following fungi contains hallucinogens?

1. Morchella esculenta
2. Neurospora sp.
3. Amanita muscaria
4. Ustilago sp.

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