name the stain used for observing animal cells
name the stain used for observing animal
cbsc class 9 Science chapter 5: Notes
Question 4- name the stain used for observing animal cells?
Question 5- who discovered free living cells ?
Question 6- name the scientist who discovered nucleus?
Question 7- who gave the term protoplasm ?
Question 8- what is cell theory? Name the two scientist who gave cell theory?
Question 9- what are unicellular and multicellular organism? Give example
Question 10 - why cells are different shapes ?
Question 11- diffusion and osmosis. Give example ?
Question 12- define the following
Question 13- how do substance like CO2 and water move in and out of the cell? Discuss
Question 14- why is the plasma membrane called a a selectively permeable membrane?
Question 15- how do roots absorb water?
Question 16-Name the process by which exchange of o2 and so2 takes place in organism?
Question 17- what is endocytosis?
Question 18- describe the structure and function of plasma membrane?
Answer- the plasma membrane allow for permits the entry and some material in in and out of the cell. It also prevents movement of some other material.
Question 19- define plasmolysis?Answer- when a living plant sale losses water through osmosis there is
shrinkage or contration of the contents of the the cell away from the cell wall. This phenomena is known as plasmolysis.
Question 20- what is cell wall?
Answer- plant cell in in addition to the plasma membrane have another rigied outer covering called cell wall. The cell wall lies outside the plasma membrane. The plant cell wall is is mainly composed of cell loss. Cell loss is a complex substance and provide structural strength to plants.
Question 21- what are the function of cell wall?
Answer- the cell wall is an outer protective membrane in many cells including plants, fungi, algae and bacteria. Animal cells do not have a cell wall. The main functions of the cell wall are to provide structure, support and protection for the cell.
The nucleus has a double largest covering called nuclear membrane. The nuclear membrane has pores which allow the transfer of material from inside the nucleus to its outside that is is to the the cytoplasm. The nucleus contents chromosome which are visible as road shaped structures only when the cell is about to drive.chromosome content information for inheritance of character from presents to next generation in the the form of DNA molecules.