AP BIOLOGY

Detailed explanation-1: -Chloroplasts contain green color pigment called chlorophyll and the green color of leaves are due to presence of these only. Leucoplasts do not contain any pigment and so they are called colorless plastids. Hence, Option D is the correct answer.

Detailed explanation-2: -The green plastids are called as a chloroplast. Chloroplasts contain a high concentration of chlorophyll pigments and little concentration of carotenoids. They capture the light which is used for photosynthesis.

Detailed explanation-3: -Chloroplasts are distinguished from other types of plastids by their green colour, which results from the presence of two pigments, chlorophyll a and chlorophyll b.

Detailed explanation-4: -Chromoplasts are coloured plastids that contain pigments other than the chlorophyll pigments. Examples are carotenoid pigments that impart yellow, orange or red colour to the plastids and hence to the plant parts.

Detailed explanation-5: -The chloroplast also has many other accessory pigments that aid in the process of photosynthesis. There are a group of pigments called carotenoids, which unlike chlorophyll, are different shades of yellow and orange.