Q28. Shape and size of cells are related to their specific
function. Comment
Q29. Name a cell which can change its shape.
Q30. Why do nerve cells have a typical elongated
shape?
Q31. What do you mean by 'division of labour' in
multicellular organisms?
How do human beings show division of labour?
Illustrate with suitable examples?
Q33. How does a unicellular organism exhibit division of
labour?
Q34. Give two functions performed by the different cell
organelles.
Q35. What are cell organelles? Why are these important
for the cell?
Q36. Do all cells have the same kind of organelles?
Q37. What is a cell made up of? What is the structural
organisation of a cell?
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Answers
Answer:
35. Cell organelles are the living parts of a cell.
Answer:
1.WBC function is to remove or kill infections and pathogens therefore it is irregular in shape.
2.To improve locomotion red blood cells can change their shapes
3.The property of nerve cells is to pass messages from brain to organs and vice versa therefore it has an elongated structure
4.Division of labour means tht the work or functions such as respiration, digestion are divided as per the cells capable to do the function. Human being show this when a particular system does the work which is divided among cells such as some cells r responsible for respiring, some for converting and supplying energy etc.
5. In unicellular organisms division of labour can be seen as the various works r divided among the organelles present in the cell .
6. Various cell organelles have various functions
7. Cell organelles r parts in the cytoplasm tht carry out different functions such as transport of material, respiration in the cell etc.
8. Plant cells and animal cells have different organelles.
9. A cell is made up of components such as cell membrane, cytoplasm and nucleus.
This is the structural organization
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