Final answer:
We are more sensitive to green light due to the peak sensitivity of rods near green wavelengths of about 500 nm and the abundant daylight in the green-yellow range to which our vision is evolutionarily adapted.
Step-by-step explanation:
Even though the human eye has a higher percentage of red cone cells, we are more sensitive to green light because of the peak sensitivity of different photoreceptors in the retina. The rod cells, which are about 1000 times more sensitive than cones, have their sensitivity peak near the green wavelengths (about 500 nm). During daylight or in well-lit conditions, cones are the primary source of vision and contribute to our perception of color. The green cones are most sensitive to light in the green-yellow range, which is also where sunlight is most intense on Earth's surface. Therefore, our eyes are evolutionarily adapted to be more sensitive to the wavelengths of light that are most common in our environment. This adaptation increases the efficiency of our vision during the day.