How does the formation of a bacterial colony support the principle of clonal reproduction in bacteria?

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BlackTom AI · Accepted Answer

Question restatement: How does the formation of a bacterial colony support the principle of clonal reproduction in bacteria?

Option a: 'Bacterial colonies consist of diverse cell types.' This is misleading because clonal colonies originate from a single progenitor and thus are genetically very similar, not inherently diverse in cell type. In many colonies, cells are similar in genotype; diversity would imply multiple lineages or mutations, which is not the defining feature of clonality.

Option b: 'Bacterial colonies result from the fusion of multiple cells.' Bacterial colonies do not form through cell fusion in the sense of merging distinct parental cells; rather, a single cell divides repeatedly to form a colony. Fusion would imply combining distinct genomes, which is not how standard bacterial colony growth occurs.

Option c: 'Bacterial colonies arise from a single cell, leading to genetically identical cells.' This statement aligns with the concept of clonal reproduction: starting from one ancestor, divisions produce offspring that are genetically identical (barring mutations), creating a colony that is a clone of the original cell.

Option d: 'Bacterial colonies undergo sexual reproduction.' Bacteria do not reproduce sexually in the way that eukaryotes do; their typical growth is asexual binary fission, producing clones. Sexual reproduction is not the mechanism behind standard bacterial colony formation.

Summary: The core idea of clonal reproduction is that a colony can originate from one cell and produce genetically identical progeny through asexual division. Among the options, option c correctly captures that concept by describing origin from a single cell and genetic identity of the resulting cells, while the other choices describe scenarios (diversity, fusion, or sexual processes) that do not define clonal colony formation.

How does the formation of a bacterial colony support the principle of clonal reproduction in bacteria?单项选择题

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