Biological Classification

In which group of organisms the cell walls form two thin overlapping shells which fit together?

1. Dinoflagellates
2. Slime moulds
3. Chrysophytes
4. Euglenoids

Pick up the wrong statement.

1. Some fungi are edible.
2. Nuclear membrane is present in Monera.
3. Cell wall is absent in Animalia.
4. Protists have photosynthetic and heterotrophic modes of nutrition.

Choose the wrong statement.

1. Morels and truffles are poisonous mushrooms.
2. Yeast is unicellular and useful in fermentation.
3. Penicillium is multicellular and produces antibiotics.
4. Neurospora is used in the study of bio-chemical genetics.

Cell wall is absent in

1. Mycoplasma
2. Nostoc
3. Aspergillus
4. Funaria.

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.