What if Humans Were Nocturnal?

What percentage of animals are primarily active at night?

• 90%

• 70%

• 50%

• 30%

What is a key factor that influences human circadian rhythms?

• Humidity

• Sound

• Daylight

• Temperature

Which part of the eye might humans develop if they were nocturnal?

• Cornea

• Tapetum lucidum

• Iris

• Lens

How might human vision change if we were nocturnal?

• More cones than rods

• Only cones

• More rods than cones

• No change

What societal change would likely occur if humans became nocturnal?

• Increased use of artificial lighting

• Shops opening during the day

• Work and school hours shifting to nighttime

• More daytime outdoor activities

How would the use of artificial lighting change in a nocturnal human society?

• It would become obsolete

• It would increase significantly

• It would decrease significantly

• It would remain the same

What might happen to nocturnal animals if humans became nocturnal?

• They would migrate

• They would become extinct

• They would become diurnal

• They would remain nocturnal

Which animal adaptation might humans develop for navigation if they were nocturnal?

• Electric sense

• Echolocation

• Infrared vision

• Magnetic sense

What is a potential effect on human society if we were nocturnal?

• Increased reliance on solar power

• Decreased appreciation for color

• Increased daytime activities

• More vibrant living environments

How might human senses change if we were nocturnal?

• Decreased sense of hearing

• Increased sense of touch

• Increased sense of taste

• Decreased sense of smell