Some of the earliest life that one would expect to find in the Archaean eon would be:Group of answer choicesCyanobacteriaNon-vascular plantsFungiInsects

The earliest life that one would expect to find in the Archaean eon would be Cyanobacteria.

Here's why:

1. The Archaean eon, which spanned from about 4 billion to 2.5 billion years ago, was characterized by a lack of oxygen in the atmosphere. This means that any life forms during this time would have to be able to survive without oxygen.

2. Cyanobacteria, also known as blue-green algae, are among the oldest known life forms on Earth. They are prokaryotes, meaning they do not have a nucleus or other membrane-bound organelles. This makes them simpler and more likely to have evolved earlier than more complex life forms.

3. Cyanobacteria are also known for their ability to perform photosynthesis, a process that produces oxygen as a byproduct. This means that they could have survived in the oxygen-poor environment of the Archaean eon.

4. In contrast, non-vascular plants, fungi, and insects are all more complex life forms that would have evolved much later. Non-vascular plants and fungi both belong to the kingdom Fungi, which did not appear until the Proterozoic eon, while insects are even more recent, appearing in the Paleozoic era.

Therefore, the most likely answer is Cyanobacteria.