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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

Why is it said that ‘a cell without nucleus is without any future’?


It is said because the nucleus controls all the metabolic activities directly or indirectly. It controls the formation of various cell organelles by controlling the synthesis of proteins. It also contains the genes which are the hereditary units. A cell without a nucleus cannot perform tha vital activities, hence, it has no future. 


Indicate whether the following statements are True (T) or False (F).

Muscle cells are branched.


A. TRUE

Make a sketch of the human nerve cell. What function do nerve cells perform?




Functions of the nerve cells :

(i) Nerve cells help in the transfer of messages from various body parts to brain and brain to various parts of the body.

(ii) They also help in the control and  coordination of the different parts of the body.




State whether the statement below is True or False

Unicellular organisms have one-celled body.


A. TRUE

Indicate whether the following statements are True (T) or False (F).

The basic living unit of an organism is an organ.


A. FALSE

Indicate whether the following statements are True (T) or False (F).

Amoeba has irregular shape.


A. TRUE