Question

write about plastids
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Answer 1

Good morning dear...how r u

Plastids: They are found in plant cell only and known as the smallest cell organelle. There are three tupes of plastids-

(1).Chloroplasts- They provide green colour to the plants so that it could make food by the process of photosynthesis.

(2).Chromoplast- They are coloured plastids.They help to attract pollination.

(3).Leucoplast - They are colourless plastids .They acts as the storage of food molecules in plant cell.

Answer 2

Explanation:

PLASTIDS

Discovery ->

✔ Haeckel discovered plastids.

Occurrence ->

✔ Only in plant cells.

Structure -

(1)  Size

length 5 - 10 micro meter

breadth 2 - 4 micro meter

4 micro meter (2) Number ➡

✔ In chlolodomonas number of plastid = 1

✔ In mesophyll cells of leaf number of plastids = 20 - 40.

(3) Shape

spherical

oval

lens shaped

discoidal shaped

Ribbon shaped

bell shaped

Schimpher

✔ Chloroplast

colour ➡ green

pigment ➡ chlorophyll

location ➡ leaf (green part of the plant)

✔ Chromoplast

colour ➡ colourful

pigment ➡ Caretonoid

location ➡ petals of flowers, fruits,  vegetative leaf(colourful).

✔ Leucoplast

colour ➡ white

pigment ➡ no pigment

Location ➡ underground part of the plant for food storage.

Leucoplast have three types

(1)  Elaioplast stores lipid

(2)  Protionplast stores protein

(3)  Amyloplast stores starch

Functions of Leucoplast

➡ synthesis of food

➡ provide colour

➡ storage of food