D. SHORT-ANSWER QUESTIONS (TYPE II): Answer these questions.
1. What are the lower levels of organization in a multicellular organism? Are these levels also
present in unicellular organisms?
2. Draw a labelled diagram to show the general structure of a cell.
3. What are the differences between plant and animal cells?
4. What is meant by the term cell division? Why is cell division necessary?
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1.Lower levels of organization in multicellular organisms are cells tissues and organs. These are followed by organ system and finally organisms. These levels are absent in unicellular organisms as they have only one cell and therefore no tissue and further levels.
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4.Cell division is the process of formation of new cells from parent cells. Cell division is necessary for the growth and development of a multicellular organism because new cells are needed to replace the old and dead cells.
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