IB BIOLOGY: CLASSIFICATION KEY COMPREHENSIVE
STUDY GUIDE 2026 FULL QUESTIONS AND SOLUTIONS
GRADED A+
● dichotomous key. Answer: step by step approach to identify an organism
● Taxonomy. Answer: science of classification
● taxonomist. Answer: Studies classification
● Linnaean Classification System. Answer: Domain, Kingdom, Phylum, Class, Order,
Family, Genus, Species
● scientific name. Answer: genus and species
● Bacteria. Answer: Simple unicellular
● Archaea. Answer: simple unicellular organisms live in extreme environments
● Protista. Answer: Unicellular complicated
● Fungi. Answer: Unicellular or multicellular absorb food
● Plantae. Answer: multicellular and make their own food
● Animalia. Answer: multicellular and take in their food
● Reptiles. Answer: dry, scaly skin, lay eggs on dry land, cold blooded
● Birds. Answer: Have feathers and wings, beams and lay eggs, warm blooded
● Fish. Answer: Scales, gills, cold blooded
● Mammels. Answer: Has fur or hair, feed young milk, warm blooded
● amphibians. Answer: Moist slimy skin, lay eggs in water, cold blooded
● Plants are classified into two groups:. Answer: vascular and nonvascular
● Difference between plants and fungi. Answer: How they obtain energy
STUDY GUIDE 2026 FULL QUESTIONS AND SOLUTIONS
GRADED A+
● dichotomous key. Answer: step by step approach to identify an organism
● Taxonomy. Answer: science of classification
● taxonomist. Answer: Studies classification
● Linnaean Classification System. Answer: Domain, Kingdom, Phylum, Class, Order,
Family, Genus, Species
● scientific name. Answer: genus and species
● Bacteria. Answer: Simple unicellular
● Archaea. Answer: simple unicellular organisms live in extreme environments
● Protista. Answer: Unicellular complicated
● Fungi. Answer: Unicellular or multicellular absorb food
● Plantae. Answer: multicellular and make their own food
● Animalia. Answer: multicellular and take in their food
● Reptiles. Answer: dry, scaly skin, lay eggs on dry land, cold blooded
● Birds. Answer: Have feathers and wings, beams and lay eggs, warm blooded
● Fish. Answer: Scales, gills, cold blooded
● Mammels. Answer: Has fur or hair, feed young milk, warm blooded
● amphibians. Answer: Moist slimy skin, lay eggs in water, cold blooded
● Plants are classified into two groups:. Answer: vascular and nonvascular
● Difference between plants and fungi. Answer: How they obtain energy
