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IB DP Biology 2025 Revision Resources

IB DP Biology 2025 Revision Resources

IB DP Biology 2025 Revision Resources includes Exam Style Questions , Study Notes , flashcards and syllabus details. These materials will help ace IB Biology exam. IB DP Biology study material here is based on latest Syllabus for First Assessment in 2025. IBO info for IB DP Biology 

Exam Style QuestionsNew

IB DP Biology 2025 Exam Style Questions with Solutions For HL and SL Syllabus are arranged by New Syllabus Topics 

IB DP Biology 2025 HL

IB DP Biology 2025 SL

IB Biology FlashcardsNew

IB DP Biology 2025 Revision Resources has flashcards with core concepts , Key terms added with diagram and visuals to ace IB Biology exam.

IB Biology SL Flashcards

IB Biology HL Flashcards

IB Biology Study NotesNew

IB DP Biology Study Notes are Organized by New Syllabus and New Exam Pattern.  These Notes includes essential terms and labeled visuals

IB DP Biology Study notes

IB Biology 2025 Syllabus Course Structure and Assessment

Ib biology syllabus for  2025 is concept based syllabus , it help students understand science through stimulating experimental program and over reaching themes. It requires students to engage in collaborative science projects.

IB DP Biology provide two courses – Standard Level  also called SL and Higher Level called HL

The SL course provides students with a fundamental understanding of biology and experience of the associated skills. The HL course requires students to increase their knowledge and understanding of the subject, and so provides a solid foundation for further study at university level.
The SL course has a recommended 150 teaching hours, compared to 240 hours for the HL course. This difference is reflected in the additional content studied by HL students. Some of the HL content is conceptually more demanding and explored in greater depth. The distinction between SL and HL is therefore one of both breadth and depth. The increased breadth and depth at HL result in increased networked knowledge, requiring the student to make more connections between diverse areas of the syllabus.

Changes in Syllabus for IBDP Biology First Assessment 2025

As per Assessment for New IBDP Biology,  There will be only 2 papers 

Paper 1A will have multiple-choice questions(MCQs).

paper 1B will have data-based questions , from across all themes.

Paper 2A will have data-based questions from unknown contexts and of  short-answer questions.

Paper 2B will have extended-response questions covering  holistic knowledge and understanding of a complete  syllabus covered, skills acquired, concepts learnt and understandings developed.

Also these option topics are removed  –(neurobiology and behaviour, biotechnology and informatics, ecology and conservation and human physiology).

Some content from these four options are incorporated into the course in  either standard level or higher level.

Calculator  is allowed  in Paper 1 also.

Syllabus Framework for IBDP Biology First Assessment 2025

The biology syllabus is organized into four main themes, each divided into two subtopics. These themes provide a framework for understanding the course material

  • Theme A: Unity and diversity
  • Theme B: Form and function
  • Theme C: Interaction and interdependence
  • Theme D: Continuity and change

The arrangement of syllabus content follows four levels of biological organization, which also serve as conceptual lenses.

  • Level 1: Molecules
  • Level 2: Cells
  • Level 3: Organisms
  • Level 4: Ecosystems

Syllabus for IBDP Biology First Assessment 2025

A. Unity and diversity

  • 1. Molecules
    • A1.1 Water
    • A1.2 Nucleic acids
  • 2. Cells
    • A2.1 Origins of cells [HL only]
    • A2.2 Cell structure
    • A2.3 Viruses [HL only]
  • 3. Organisms
    • A3.1 Diversity of organisms
    • A3.2 Classification and cladistics [HL only]
  • 4. Ecosystems
    • A4.1 Evolution and speciation
    • A4.2 Conservation of biodiversity

B. Form and function

  • 1. Molecules
    • B1.1 Carbohydrates and lipids
    • B1.2 Proteins
  • 2. Cells
    • B2.1 Membranes and membrane transport
    • B2.2 Organelles and compartmentalization
    • B2.3 Cell specialization
  • 3. Organisms
    • B3.1 Gas exchange
    • B3.2 Transport
    • B3.3 Muscle and motility [HL only]
  • 4. Ecosystems
    • B4.1 Adaptation to environment
    • B4.2 Ecological niches

C.  Interaction and interdependence

  • 1. Molecules
    • C1.1 Enzymes and metabolism
    • C1.2 Cell respiration
    • C1.3 Photosynthesis
  • 2. Cells
    • C2.1 Chemical signaling [HL only]
    • C2.2 Neural signaling
  • 3. Organisms
    • C3.1 Integration of body systems
    • C3.2 Defence against disease
  • 4. Ecosystems
    • C4.1 Populations and communities
    • C4.2 Transfers of energy and matter

D. Continuity and change

  • 1. Molecules
    • D1.1 DNA replication
    • D1.2 Protein synthesis
    • D1.3 Mutations and gene editing
  • 2. Cells
    • D2.1 Cell and nuclear division
    • D2.2 Gene expression [HL only]
    • D2.3 Water potential
  • 3. Organisms
    • D3.1 Reproduction
    • D3.2 Inheritance
    • D3.3 Homeostasis
  • 4. Ecosystems
    • D4.1 Natural selection
    • D4.2 Stability and change
    • D4.3 Climate change
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