Question

why is it difficult to classify bacteria? Give two reasons.

Answer 1

it is difficult to classify because it has a very simple design and does not have any specific character to distinguish it from other
 
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Answer 2

1) Bacteria is the largest group of living organisms found everywhere on earth . They are omnipresent. These occur so many species of bacteria that they are very difficult to be classified.
2) They are generally quite small and have simple shapes so they are difficult to classified.

.....I hope this will help u ......