This official Life and Earth Sciences (SVT) examination paper from the EEHB Baccalaureate 2023 session is a comprehensive document containing both the exam questions and detailed answer key. It is structured in two parts evaluating candidates' resources and competencies.

Part A begins with knowledge assessment through an Open Response Questions (QRO) exercise on human reproduction, specifically male infertility causes (cryptorchidism and oligospermia). A document analysis exercise addresses neurophysiology, studying nerve impulse propagation speed based on nerve fiber type (myelinated or unmyelinated), diameter, and temperature.

The practical skills assessment includes two major exercises. The first focuses on human genetics: constructing and analyzing pedigrees illustrating autosomal inheritance, studying ABO blood groups, building a family tree, and calculating genetic probabilities. The second exercise covers experimental immunology, interpreting experimental results on immune response types (role of the thymus, B lymphocytes, antibody production, specificity of humoral immune response).

Part B evaluates competencies through a problem-based scenario centered on reducing risks related to natural disasters, particularly flooding. Candidates must:

• Explain human behaviors responsible for flooding and propose eco-friendly actions
• Present arguments showing that populations are also victims of natural floods
• Design an awareness poster with eco-citizen actions to reduce flooding

The complete answer key is included with detailed evaluation grids comprising criteria for relevance, mastery of scientific knowledge, and coherence. This document is an essential revision tool for Baccalaureate series C and Ti candidates seeking to master genetics, immunology, and environmental risk management.