Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
R.H. Whittaker (1969) proposed the Five Kingdom Classification based on: complexity of cell structure, body organization, mode of nutrition, life cycle, and phylogenetic relationships.
Kingdom Monera: Consists of unicellular prokaryotes (e.g., Bacteria, Cyanobacteria). They lack a defined nucleus and membrane-bound organelles like mitochondria or chloroplasts.
Kingdom Protista: Includes all unicellular eukaryotes. This group acts as a link between Monera and the multicellular kingdoms. They may be autotrophic or heterotrophic.
Kingdom Fungi: Primarily multicellular (except yeast), heterotrophic (saprophytic or parasitic) organisms. Their cell wall is uniquely composed of Chitin, a polymer of ().
Kingdom Plantae: Multicellular, eukaryotic autotrophs that contain chlorophyll and perform photosynthesis to synthesize organic food ().
Kingdom Animalia: Multicellular, eukaryotic heterotrophs that lack cell walls. They exhibit a holozoic mode of nutrition (ingestion of food).
Phylogenetic Relationship: The classification reflects evolutionary history, progressing from prokaryotic () to simple eukaryotic () to complex multicellular eukaryotic organisms (, , ).
📐Formulae
, describing the heterotrophic respiration in Kingdom Animalia.
💡Examples
Problem 1:
Identify the kingdom of an organism that is unicellular, eukaryotic, photosynthetic, and possesses a flagellum for movement.
Solution:
Kingdom Protista
Explanation:
Since the organism is unicellular and eukaryotic, it must belong to Kingdom Protista. Examples include , which exhibits both autotrophic (photosynthetic) and heterotrophic behavior.
Problem 2:
In which kingdom would you place a multicellular organism that has a cell wall, lacks chlorophyll, and obtains nutrients from decaying organic matter?
Solution:
Kingdom Fungi
Explanation:
The presence of a cell wall and multicellularity suggests Plantae or Fungi, but the lack of chlorophyll and saprophytic nutrition () specifically identifies it as Fungi.
Problem 3:
Calculate the theoretical yield of during the complete aerobic oxidation of one molecule of glucose () in a member of Kingdom Animalia.
Solution:
Explanation:
In eukaryotic organisms (Animalia), the breakdown of through glycolysis, the Krebs cycle, and the Electron Transport Chain results in a net gain of approximately molecules of .