E deledu plus rouge au fond des lacs La lumière visible est un ensemble de radiations
de différentes couleurs, caractérisées par leur
longueur d'onde
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

On a backpacking trip, kenny hikes all day at a steady pace, covering 30 kilometers and burning 4000 calories. at the school track, janelle runs the 100-meter sprint in 13.5 seconds, burning 10 calories. afterward, janelle’s leg muscles are aching and she is breathing hard, while kenny maintains normal breathing all day, even though he burns 400 times more calories than janelle. which two statements offer the best explanation for this phenomenon? a. if the aerobic pathway—cellular respiration—cannot meet the energy demand, then the anaerobic pathway—lactic acid fermentation—starts up, resulting in lactic acid buildup and "oxygen debt." b. aerobic cellular respiration produces more energy, but its use is limited because of lactic acid buildup in the muscles and the resulting "oxygen debt." c. after about 90 seconds of intense exercise, the muscles become depleted of oxygen, and anaerobic respiration can no longer function to produce atp, resulting in "oxygen debt." d. the rate of energy demand determines how the muscles will obtain energy, either from cellular respiration or from lactic acid fermentation if not enough oxygen is present.