Biology · Grades 7–11
Classification, biodiversity and relatedness · Revision sheet
Separate similarity, ancestry and the evidence used to classify.
Learn the idea
Classification
Organisms can be grouped using shared characteristics and evolutionary evidence.
Biodiversity
Diversity includes genetic, species and ecosystem dimensions.
Trees
A branching evolutionary tree models common ancestry; branch-tip order alone is not a progress ranking.
Evidence
Molecular, anatomical and other data can revise relationships as understanding improves.
Explain without looking
- Why might scientific classification change?
- What does species richness count in a simple survey?
Further reading and review references
- openstax.org · reference 1
- www.genome.gov · reference 2
- www.genome.gov · reference 3
- www.genome.gov · reference 4
- www.genome.gov · reference 5
- www.genome.gov · reference 6
These are reference links, not copied exercises, institutional endorsement or proof of independent review.
Independent educational review required. Grade bands are approximate; these are not officially aligned curricula.