bridging activity for 9th(solution) notebook carries marks so index and work has to be really very good

Students you may take the print out and paste as bridging activity 
(only after checking your own answers)plant cell ,animal cell and bacteria after pasting have to be drawn with sharp pencil and neat labelling.
Q1Cell is the structural and functional unit of life .

Q2 If nucleus is removed
The nucleus is the control house of the cell and if it is removed the cell will have no information for performing any function and it would die.

Q3 Cell Theory was proposed by M J Scheilden ,T Schwann

Q4 Chlorophyll is responsible for  photosynthesis in leaves of the plants

Q5 Ribosomes are associated with protein synthesis

Q6 DNA   is Deoxyribose nucleic acid

Q7 Plasma membrane is the true guard of the cell ,it allows only selected substances to pass through  it so it is also called selectively or semi permeable membrane .

Q8  cell wall present in plant cell mainly constitutes cellulose.

 Q9 The reticulum which has ribosomes attached to it is called rough endoplasmic reticuum

Q10 S E R  does not have ribosomes attached to it whereas  RER contains ribosomes attached to it.Their functions are also different S E R helps in synthesis of carbohydrates and lipids
(fats) whereas  R E R helps in synthesis of proteins with ribosomes.

Q11  Single celled organisms-----
       Amoeba, Paramecium, Euglena,   Bacteria , Nostoc or any other....

Q12  Chromosome contains gene made up of D N A which contains  the information of the  cell
so each chromosome is a collection of genes containing specific information of the cell.

Q 13 Plasma membrane is mede up of proteins and lipids .

Q14  If plasma membrane ruptures the cell would die as any substance can move in or out randomly.

Q15  Nucleus is made up of double membrane containing chromosomes made up of D N A and it has nucleolus made up of R N A .

Q16  In 1892, Dmitri Ivanovsky isolated virus and  Martinus Beijerinck called the filtered, infectious substance a "virus" and this discovery is considered to be the beginning of virology.

Q17 cell is involved in making the whole organism ie the structure of the organism and also inside the cell all the activities take plce like protein synthesis, fat and carbohydrate metabolism ,etc. therefore not only it is structural but also functional unit of life.

Q18 


Q19animal cell


Difference between plant and Animal cell

Q20

Q21Plastids have their own DNA and ribosomes .