Asked by Victor Juarez on Jun 13, 2024
Verified
Assuming that the visual systems of humans and other mammals function similarly,you would expect that the retina of a nocturnal mammal (one active only at night) would contain
A) mostly cones.
B) mostly rods.
C) an equal number of rods and cones.
D) more bipolar cells than an animal active only during the day.
Nocturnal
Pertaining to or occurring during the night; active or awake at night.
Retina
The light-sensitive layer of tissue at the back of the eye that captures images and sends visual information to the brain.
Rods
Photoreceptor cells in the retina of the eye that are responsible for vision at low light levels.
- Recognize the distinction between rods and cones and their distribution in nocturnal and diurnal animals.
Verified Answer
MM
Melissa MendozaJun 19, 2024
Final Answer :
B
Explanation :
Nocturnal mammals have adapted to see in low light conditions, and therefore have a greater density of rod cells in their retina than cone cells. Rod cells are more sensitive to low levels of light and are better suited for night vision.
Learning Objectives
- Recognize the distinction between rods and cones and their distribution in nocturnal and diurnal animals.