Biological Classification

Topics in this chapter

• Classification Systems
• Bacteria And Archaea
• Protista And Its Groups
• Fungal Groups And Reproduction
• Viruses, Viroids And Prions

Cheat sheet

Practice questions

1. Question 1Q-902EA5

   Who proposed a five-kingdom classification system, dividing organisms into Monera, Protista, Fungi, Plantae, and Animalia?

   1. A.R.H. Whittaker
   2. B.Carl Linnaeus
   3. C.D.J. Ivanowsky
   4. D.M.W. Beijerinck
   See the answer and solution
2. Question 2Q-50059B

   Which of the following organisms are known as chief producers in the oceans?

   1. A.Dinoflagellates
   2. B.Euglenoids
   3. C.Diatoms
   4. D.Slime moulds
   See the answer and solution
3. Question 3Q-A82BEB

   The cell wall of fungi is principally composed of which of the following substances?

   1. A.Cellulose and pectin
   2. B.Chitin and polysaccharides
   3. C.Peptidoglycan
   4. D.Muramic acid
   See the answer and solution
4. Question 4Q-7E6F31

   Which of the following statements is correct regarding viroids?

   1. A.They contain a high molecular weight double-stranded DNA.
   2. B.They are infectious protein particles without any nucleic acid.
   3. C.They contain free RNA of low molecular weight and lack a protein coat.
   4. D.They infect only animal hosts, causing spongiform encephalopathy.
   See the answer and solution
5. Question 5Q-6F0491

   Select the correct combination of characters for Ascomycetes (sac fungi):

   1. A.Mycelium is aseptate and coenocytic; asexual spores are zoospores.
   2. B.Mycelium is branched and septate; asexual spores are conidia produced endogenously.
   3. C.Mycelium is branched and septate; asexual spores are conidia produced exogenously.
   4. D.Sexual spores are basidiospores produced exogenously on a basidium.
   See the answer and solution