Biological Classification

Which one of the following is a slime mould?

1. Physarum
2. Thiobacillus
3. Anabaena
4. Rhizopus

Which one of the following statements about Mycoplasma is wrong?

1. They are pleomorphic.
2. They are sensitive to penicillin.
3. They cause diseases in plants.
4. They are also called PPLO.

Which pair of the following belongs to basidiomycetes?

1. Puffballs and Claviceps
2. Peziza and stinkhorns
3. Morchella and mushrooms
4. Bird's nest fungi and puffballs

Which of the following environmental conditions are essential for optimum growth of Mucor on a piece of bread? Choose the answer from the following options.

1. B, C and F only
2. A, C and E only
3. A, D and E only
4. B, D and E only

What is common about Trypanosoma, Noctiluca, Monocystis and Giardia?

1. These are all parasites
2. These are all unicellular protists
3. They have flagella
4. They produce spores

The causative agent of mad-cow disease is a-

1. Virus
2. Bacterium
3. Prion
4. Worm

The bacterium ( Clostridium botulinum) that causes botulism is-

1. A facultative aerobe
2. An obligate aerobe
3. A facultative anaerobe
4. An obligate anaerobe

Barophilic prokaryotes

1. grow and multiply in very deep marine sediments
2. occur in water containing high concentrations of barium hydroxide
3. readily grow and divide in sea water enriched in any soluble salt of barium
4. grow slowly in highly alkaline frozen lakes at high altitudes.

There exists a close association between the alga and the fungus within a lichen. The fungus

1. provides protection, anchorage and absorption for the alga
2. provides food for the alga
3. fixes the atmospheric nitrogen for the alga
4. releases oxygen for the alga

Auxospores and hormogonia are formed, respectively, by

1. some diatoms and several cyanobacteria
2. some cyanobacteria and many diatoms
3. several cyanobacteria and several diatoms
4. several diatoms and a few cyanobacteria.