Question

define plastids and how many kinds of plastids are there??​

Answer 1

Plastids are double-membrane organelle which are found in the cells of plants and algae. Plastids are responsible for manufacturing and storing of food.

Common Plastids –

Chloroplasts

Chromoplasts

Leucoplasts

Answer 2

Actually, Plastids are the double membrane cell organelles. It is found in the plants (autotrophic) only. It is the site of manufacturing and storage of various chemical componds. Plastids can be divided into two parts:- 1. Leucoplasts (colourless) and 2. Chromoplasts (coloured).

Again,

Chromoplasts can be divided into three parts:-

1. Chloroplast=> Green color pigment. Chloroplast helps in photosynthesis and it is the site of Photosynthesis.

2. Phaeoplasts=> Brown color pigment.Its pigment is called Xanthophyll Pigment.

3. Rhodoplasts=> It is a red coloured pigment. Its pigment is called Phycosthythrin.Function of Plastids are as follow:-

1. Leucoplasts store the reserve foods in the form of Starch.

2. Chromoplasts helps in Pollination or it also provide the attractive color into the differ parts of Plants.

3. Chloroplast are the site of Photosynthesis so they are called the kitchen of the Cell.