Question

Animals perceiving colored images are
(a)Primates
(b)Birds
(c)Lizards and snakes
(d)All of the above

Answer 1

The colored images are perceived with the help of the photoreceptor cells present in the retina of the eye consisting of rods and cones. They are present in various organisms belonging to various classes of vertebrates.

Complete answer:
The animals perceiving colored images are due to the presence of the photoreceptor cells. It is found in the case of all reptiles, aves, and mammals including birds, primates, snakes, and lizards. The parietal eye is present in birds and reptiles that are called the third eye and help in perceiving colored images.

Additional Information:
-The human eye is sensitive to light of wavelength 380-760 nm. It is the wavelength range of the visible spectrum. The human eye is a sense organ that receives visual images, which are then sent to the brain for understanding the view.
-Retina is a layer of nervous tissue that covers the back two-thirds of the inside of the eyeball, in which stimulation by light occurs, initiating the sensation of vision. The retina is an extension of the brain nerve and is connected to the brain by the optic nerve.
-The photoreceptor cells are the outermost cell of the retina present next to bipolar cells. They detect daylight and low light vision. There are two types of photoreceptor cells in the retina; the cones are responsible for detecting daylight and colored light while the rods detect low light vision.
-The rods and cones consist of various pigments that help them in perceiving colored images.
-The rod contains a pigment called rhodopsin that helps the organisms to visualize even in the low light intensity.
-The cone contains various pigments including porpyrosin, iodopsin, and cyanopsin that contain a protein photopsin that helps the organism to visualize during the daytime.
-The light rays first enter the eye from there it goes to the nerve endings where the impulse is generated and transmitted to the brain’s visual cortex region and finally from there the image is sent and the image is formed on the retina of the eye.
So, the correct answer is ‘All of the above’.

Note: The birds are found to have super color vision that even humans do not have. These color visions help animals in finding their food, predators, mates, etc. In the case of snakes, they mostly visualize colors when they have fever-heat which is also called thermal vision.