Adaptations
The habitat of each living thing and what each feature is for.
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Teaching guide: evolution and natural selection
This evolution worksheet generator makes A4 exercises on adaptations, Lamarck’s and Darwin’s explanations, natural selection with population data, evidence for evolution and phylogenetic trees, always with an answer key.
- For
- Elementary 6th · Middle & High 7th, 10th (ages 11-15)
- Subject
- Natural Sciences › Biology & Genetics
- Includes
- Student sheet and answer key
- Format
- A4, to print or save as PDF; new exercises every time
- Price
- Free, no sign-up
- Available in
- Catalan, Spanish, English
Student worksheet 
Answer key Lamarck or Darwin
Explanations to sort and the steps of natural selection to put in order.
Natural selection with data
Moths, rabbits, beetles or bacteria over the generations, with exact sums.
Evidence for evolution
Homologous and analogous structures, fossils, embryology, DNA and biogeography.
Phylogenetic trees
Random trees to find relatives and common ancestors.
Answer key
Every answer comes from the case data or the drawn tree.
Questions about the evolution worksheets
Which grades are they for?
Adaptations suit grades 6 and 7; Lamarck and Darwin, natural selection and the evidence suit grade 10 (KS4); six-species trees go up to grade 11.
Are the population numbers real?
No: they are example data worked out with a rule the sheet explains, so the results are exact. The cases themselves (peppered moths, resistant bacteria) are real examples of natural selection.
Are the species on the trees real?
They are lettered species (A, B, C…) on random trees, to practise reading trees without having to know the relationships by heart.
Which other worksheets go well with these?
How do I print only the answer key?
Click Print and choose “Answer key”, or “Worksheet and answer key” for both.
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