IB BIOLOGY: CLASSIFICATION KEY CERTIFICATION
SCRIPT 2026 QUESTIONS WITH SOLUTIONS GRADED A+
● Species. Answer: A group of organisms which can interbreed and produce fertile offspring.
● Binomial nomenclature. Answer: An internationally used system which is used to name
and classify a species. Set out as:
● Genus species. Answer: (Homo sapiens)
● Animal kingdoms. Answer: A grouping which divides all species into 5 groups: Plantae,
Fungi, Animalia, Protista and Prokaryotae
● Taxonomy. Answer: The classification of species - levels of classification to specialise
species are:
● Emu classification. Answer: Eukaryotae
● Lobelia classification. Answer: Plantae
● Non-vascular plantae. Answer: Plantae without internal structure for respiration (xylem
and phloem). Chlorophyta and bryophyta are the main classification, and the lack of structure
leads to low lying organisms (algae, moss).
● Vascular plantae. Answer: Plantae with internal structure (xylem and phloem). Main
classifications are filicophyta (ferns), coniferophyta (pines) and angiosperms (flowering
plants).
● Dichotomous key. Answer: A series of yes or no questions which lead to a certain species
classification.
● Natural classification. Answer: Grouping together different species by a common
ancestor.
● Artificial classification. Answer: Grouping together different species by a common skill
(birds, bats and bees being grouped as they all fly).
● Convergent evolution. Answer: Different species sharing traits as they are selected for -
this can cause a relation to appear close when it may be distant.
SCRIPT 2026 QUESTIONS WITH SOLUTIONS GRADED A+
● Species. Answer: A group of organisms which can interbreed and produce fertile offspring.
● Binomial nomenclature. Answer: An internationally used system which is used to name
and classify a species. Set out as:
● Genus species. Answer: (Homo sapiens)
● Animal kingdoms. Answer: A grouping which divides all species into 5 groups: Plantae,
Fungi, Animalia, Protista and Prokaryotae
● Taxonomy. Answer: The classification of species - levels of classification to specialise
species are:
● Emu classification. Answer: Eukaryotae
● Lobelia classification. Answer: Plantae
● Non-vascular plantae. Answer: Plantae without internal structure for respiration (xylem
and phloem). Chlorophyta and bryophyta are the main classification, and the lack of structure
leads to low lying organisms (algae, moss).
● Vascular plantae. Answer: Plantae with internal structure (xylem and phloem). Main
classifications are filicophyta (ferns), coniferophyta (pines) and angiosperms (flowering
plants).
● Dichotomous key. Answer: A series of yes or no questions which lead to a certain species
classification.
● Natural classification. Answer: Grouping together different species by a common
ancestor.
● Artificial classification. Answer: Grouping together different species by a common skill
(birds, bats and bees being grouped as they all fly).
● Convergent evolution. Answer: Different species sharing traits as they are selected for -
this can cause a relation to appear close when it may be distant.
