BackFree Version
Biology HL | Unity and Diversity
Evolution and Speciation
Subtopic 8 of 9Covers: Mechanisms of evolution: Natural selection, genetic drift, gene flow · Speciation: Allopatric and sympatric · Adaptive radiation · Theories of evolution (Darwin, Lamarck)
261+Practice questions in this subtopic
Revision notesPremium
Practice worksheetPremium
Subject mocksFull papers & tests
Your Learning Journey for this Subtopic
Follow this sequence to master the subtopic.
- 1
StudyConcept Notes
PremiumUnderstand concepts and worked examples.
- Concept explanations with examples
- Key points and formulas
- Diagrams and solved examples
- Exam tips and common mistakes
- 2
PractiseConcept Practice
PremiumBuild skills and master the concepts.
- Topic-focused practice questions
- Builds skills before the worksheet
- Answers to check your work
- Download as a PDF to practise offline
- 3
AssessAssessment Worksheet
PremiumAttempt structured exam-style assessment.
- Mix of question types and marks
- IB-style questions
- Full mark scheme
- Download as a PDF to practise offline
- Builds exam timing and technique
- 4
Exam PracticeExam-Style Question Bank
FreePractise exam questions online with answers and mark schemes.
Topic : Unity and Diversity
Topic Notes
Free- Whole-topic overview
- Key ideas across every subtopic
- Quick revision before tests
- Ideal before the topic Live Test
Topic Worksheets
Premium- Mixed questions across the topic
- Exam-style marks
- Full mark scheme
- Download as a PDF to practise offline
Live Test and Results
Premium- Timed, exam-style questions
- Instant score and answer review
- Track your progress
- Covers the whole topic
Subject : Biology HL
Full Subject Mock Papers
- 3 full-length IB-style mock paper sets
- Printable PDF with full mark schemes
- Covers the entire Biology HL syllabus
Road to 7 Mock Test (Online)
- Timed, exam-style test
- Auto-graded with a performance report
- Topic-by-topic analysis
- Find your strengths and weak areas
Other Subtopics in Unity and Diversity
Continue your learning journey.