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IB BIOLOGY CLASSIFICATION KEY ACTUAL EXAM PAPER 2026 QUESTIONS WITH SOLUTIONS GRADED A+

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IB BIOLOGY CLASSIFICATION KEY ACTUAL EXAM PAPER 2026 QUESTIONS WITH SOLUTIONS GRADED A+

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IB BIOLOGY CLASSIFICATION KEY ACTUAL
EXAM PAPER 2026 QUESTIONS WITH
SOLUTIONS GRADED A+

◉ Taxonomy. Answer: the naming and arranging of living organisms
into groups


◉ Phylogeny. Answer: evolutionary history


◉ Histones. Answer: proteins that DNA is wrapped around to form
chromosomes


◉ Introns. Answer: sequences of pairs in DNA that are transcribed but
NOT translated: NON-CODING
(not used to form mRNA)


◉ Exons. Answer: sequences of pairs in DNA that are transcribed AND
translated: CODING
(used to form mRNA)


◉ Binomial System of Nomenclature. Answer: System of classifying
organisms by 2 name system
(bi=2, nomen=name)

, Latin or Greek
"Genus species"


◉ Rules of Binomial Nomenclature. Answer: 1. Genus = Uppercase
2. species = lowercase
3. Italics if typed
4. Underlined if handwritten


◉ Aristotle Classification. Answer: used until 1400s


◉ Carolus Linneaus Classification. Answer: 1700s to now


◉ Hierarchy of Taxa (7). Answer: Kingdom
Phylum
Class
Order
Family
Genus
Species


◉ Taxon. Answer: a taxonomic group of any rank
EX: species, family, class
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