How are the biological functions of living or | vedclass

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(B) $\Rightarrow$ In unicellular organisms,all functions like digestion,respiration,and reproduction are performed by a single cell. In the complex bo

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By division of labour among cells,tissues,organs,and organ systems

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(B) $\Rightarrow$ In unicellular organisms,all functions like digestion,respiration,and reproduction are performed by a single cell. In the complex body of multicellular organisms,the same basic functions are carried out by different groups of cells in a well-organized manner.$\Rightarrow$ In multicellular animals,a group of similar cells along with intercellular substances performs a specific function. Such an organization is called a tissue.$\Rightarrow$ All complex animals consist of only four basic types of tissues. These tissues are organized in specific proportions and patterns to form an organ (e.g.,lung,heart,stomach,kidney). When two or more organs perform a common function by their physical and/or chemical interaction,they together form an organ system (e.g.,digestive system,respiratory system).$\Rightarrow$ Cells,tissues,organs,and organ systems split up the work in a way that exhibits division of labour and contributes to the survival of the body as a whole.

List-$I$	List-$II$
$(a)$ Bronchioles	$(i)$ Dense Regular Connective Tissue
$(b)$ Goblet cell	$(ii)$ Loose Connective Tissue
$(c)$ Tendons	$(iii)$ Glandular Tissue
$(d)$ Adipose Tissue	$(iv)$ Ciliated Epithelium

How are the biological functions of living organisms carried out?

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