1. viroid
2. virion
3. viral
4. None of these
viroid
1. Asterias nebula
2. Astropecten
3. Ophiothrix
4. Cucumaria
Ophiothrix
1. bacteria
2. virion
3. prion
4. mycoplasma
prion
1. Thyone
2. Synapta
3. Cucumaria
4. All the above
All the above
1. nucleic acid only
2. proteins only
3. lipids only
4. All of these
All of these
1. Poorly developed
2. Well developed
3. Over developed
4. Absent
Poorly developed
1. Sea cucumber
2. Sea star
3. Sea Lily
4. Brittle star
Sea Lily
1. adenovirus
2. mosaic virus
3. T-even virus
4. retrovirus
retrovirus
1. DNA polymerase
2. reverse transcriptase
3. endonuclease
4. ligase
reverse transcriptase
1. Ophiuroidea
2. Echinoidea
3. Asteridea
4. Crinoidea
Ophiuroidea