Question 4 : Comparer la surface des taches rouges chez les différents mâles étudiés et proposer une explication aux différences constatées. /2pts
Question 5 : Relier la capacités de perception du « rouge » par les femelles en fonction de la longueur d'onde du
milieu de vie ./4pts
Question 6 Conclusion: Expliquer comment la difficulté de réception du signal de communication ( ici les taches
rouges) peut contribuer à la spéciation aboutissant à la formation de deux nouvelles espèces /5pts

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.