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Bacteria lack alternation of generation because there is

1. neither syngamy nor reduction division
2. distinct chromosomes are absent
3. no conjugation
4. no exchange of genetic material

Correct answer: neither syngamy nor reduction division

Solution

Alternation of generations requires a life cycle with both syngamy (fusion of gametes) and reduction division (meiosis) to switch between haploid and diploid phases. Bacteria do not have this kind of sexual cycle, so they lack alternation of generations.

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