Which argument is the most valid?
1) These organisms are very different and, therefore, are not related.
2) These organisms are likely to have a common ancestor because of the similarities in their developmental patterns.
3) Because of the similarities in the development of these organisms, they would likely only differ at the genus level when classified.
4) These organisms may look similar during development, but because they take different amounts of time to develop, they do not share a common ancestor.