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Class 9
Biology :-NCERT Solution - The Fundamental Unit Of Life

Page No 63:
Question 1:
Fill in the gaps in the following table illustrating differences between prokaryotic and eukaryotic cells.

 

Prokaryotic cell

 

Eukaryotic cell

1.

Size: generally small ( 1-10 µm) 1 µm== 10-6 m

1.

Size: generally large (5-100 µm)

2.

Nuclear region: _____________________________ and is known as ________.

2.

Nuclear region: well-defined and surrounded by a nuclear membrane

3.

Chromosome: single

3.

More than one chromosome

4.

Membrane-bound cell organelles are absent

4.

________________________________________________________________________________________________


Answer:

 

Prokaryotic cell

 

Eukaryotic cell

1.

Size: generally small ( 1-10 µm) 1 µm== 10-6 m

1.

Size: generally large (5-100 µm)

2.

Nuclear region: poorly defined because of the absence of a nuclear membrane, and is known as nucleoid

2.

Nuclear region: well-defined and surrounded by a nuclear membrane

3.

Chromosome: single

3.

More than one chromosome

4.

Membrane-bound cell organelles are absent

4.

Membrane-bound cell organelles such as mitochondria, plastids, etc., are present