Which one of the following organisms is not an example of eukaryotic cells?

1.  Escherichia coli

2.  Euglena viridis

3.  Amoeba proteus

4.  Paramecium caudatum

Virus envelope is known as:
1. capsid
2. virion
3. nucleoprotein
4. core

Infectious proteins are present in:
1. geminiviruses
2. prions
3. viroids
4. satellite viruses

T.O. Diener discovered a:
1. free infectious RNA
2. free infectious DNA
3. infectious protein
4. bacteriophage

The thalloid body of a slime mould (Myxomycetes) is known as:
1. protonema
2. Plasmodium
3. fruiting body
4. mycelium

What is common about Trypanosoma, Noctiluca, Monocystis, and Giardia?
1. These are all unicellular protists
2. They have flagella
3. They produce spores
4. These are all parasites

Evolutionary history of an organism is known as:

1. Phylogeny

2. Ancestry

3. Palaeontology

4. Ontogeny

The causative agent of mad-cow disease is a:

1. bacterium

2. prion

3. worm

4. virus

Which of the following statements is incorrect?