Which of the following is not an example of a | vedclass

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(B) tissue is defined as a group of cells having a common origin and usually performing a common function. $(a)$ Epidermis is a tissue (epithelial tis

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$A$ colony of protozoa

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(B) tissue is defined as a group of cells having a common origin and usually performing a common function. $(a)$ Epidermis is a tissue (epithelial tissue). $(b)$ $A$ colony of protozoa is not a tissue because protozoa are unicellular organisms; a colony is merely an aggregation of individual organisms,not a group of cells working together as a single functional unit. $(c)$ Grey matter of the spinal cord is a tissue (nervous tissue). $(d)$ Blood is a tissue (fluid connective tissue). Therefore,the correct answer is $B$.

Which of the following is not an example of a tissue?

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