IB BIOLOGY: CLASSIFICATION KEY FINAL TEST 2026
QUESTIONS WITH CORRECT ANSWERS GRADED A+
● 5.5.1: Outline the binomial system of nomenclature. Answer: In the classification of
living organisms, the basic group is the species. A species is a group with similar
characteristics, which can interbreed and produce fertile offspring. Every species is classifies
into a genus. A genus is a group of similar species.
● 5.5.2: List seven lives in the hierarchy of taxa - kingdom, phylum, class, order, family,
genus and species - using an example from two different kingdoms for each level.
Answer: Blue whale (Balaenoptera musculus):
● 5.5.3: Distinguish between the following phyla of plants, using simple external
recognition features: bryophyta, filicinophyta, coniferophyta and angiospermophyta.
Answer: 5.5.3: Distinguish between the following phyla of animals, using simple external
recognition features: porifera, cnidaria, platyhelminthes, annelida, mollusca and arthropoda
QUESTIONS WITH CORRECT ANSWERS GRADED A+
● 5.5.1: Outline the binomial system of nomenclature. Answer: In the classification of
living organisms, the basic group is the species. A species is a group with similar
characteristics, which can interbreed and produce fertile offspring. Every species is classifies
into a genus. A genus is a group of similar species.
● 5.5.2: List seven lives in the hierarchy of taxa - kingdom, phylum, class, order, family,
genus and species - using an example from two different kingdoms for each level.
Answer: Blue whale (Balaenoptera musculus):
● 5.5.3: Distinguish between the following phyla of plants, using simple external
recognition features: bryophyta, filicinophyta, coniferophyta and angiospermophyta.
Answer: 5.5.3: Distinguish between the following phyla of animals, using simple external
recognition features: porifera, cnidaria, platyhelminthes, annelida, mollusca and arthropoda
