The deficiency of pigment melanin leads to……………… 

Circulatory system: Circulatory system is of open type (except in Sepia, where it is of the closed type). Blood contains a copper-containing blue-coloured respiratory pigment called haemocyanin.

1. (A) Chloroplasts 2. (B) Ribosomes are double membrane bound cell organelles. 3. (C) perinuclear space 4. (A) nucleus 5. (B) 46 6. (D) Metaphase 7. (A) tubulin

(C) 250 to 400

(B) Calciferol

A) rhodopsin

Correct option is D) skin

Correct option is B) Retina

Correct option is D) light

C) Skin colour

(D) Haemoglobin