Question

The Protoplast in Nostoc differentiated into outer coloured portion called

a Filament

Heterocyst

t. Chromoplasm

d Centroplasm
​

Answer 1

Answer:

option d is your answer

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Answer 2

Answer:

The Protoplast in Nostoc differentiated into an outer colored portion called Chromoplasm.

Explanation:

Nostoc is a prokaryotic organism belonging to the genus of cyanobacteria or blue-green algae that can fix nitrogen and undertake photosynthesis. They are mostly found as free rocks or at the bottom of lakes in freshwater.

Nostoc's cells are rounded in form. An outer cell wall protects it. The cell's protoplasm is divided into two parts:

• Centroplam also known as the central body: It's the colorless inside of the cell that holds the food granules. It serves as a nucleus as well. There is no real nucleus in the cell. The nucleus' function is performed by the central body as it lacks a nuclear membrane or nucleolus, and is referred to as an incipient nucleus.
• Chromoplasm: It's the blue-green pigmented section of the cell wall that's on the outside. Because of the presence of Chlorophyll pigments, it also helps to prepare food.