Question

Several statements are given here in reference to cone cells which of the following option indicates all correct statements for cone cells?
Statements
(i) Cone cells are less sensitive in bright light than Rod cells
(ii) They are responsible for colour vision
(iii) Erythropsin is a photo pigment which is sensitive to red colour light
(iv) They are present in fovea of retina.

• A. (iii), (ii) and (i)
• B. (ii), (iii) and (iv)
• C. (i), (iii) and (iv)
• D. (i), (ii) and (iv)

Answer 1

The correct option is (D):

Statement (i):

1. Cone cells are responsible for bright light vision.
   
2. Rod cells are dedicated for the dim light vision.
3. Hence, this statement is true.

Statement (ii):

1. ​Cone cells are responsible for colored vision which means the photoreceptors of cone cells can specifically detect colors.
   
2. Hence, this statement is true.
   

Statement (iii):

1. Erythropsin is present in the rod cells of certain fishes and higher vertebrates.
   
2. Erythropsin is not a part of the cone cells.
3. Hence, this statement is false.
   

Statement (iv):

1. The fovea of the retina is only filled with the cone cells and cone photoreceptors.
   
2. Hence, this statement is true. ​

Final Answer: Hence the correct statements about cone cells are statements (i), (ii) and (iv).