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protist ,

This is a dubious claim, and a hard one to prove conclusively either way. The first trees are likely older than 350 MYA, eg https://en.m.wikipedia.org/wiki/Archaeopteridales, which lived during the second half of the Devonian around 400 MYA. As for the first sharks, modern sharks evolved in the Jurassic, around 200 MYA. However:

Some sources extend the term “shark” as an informal category including extinct members of Chondrichthyes (cartilaginous fish) with a shark-like morphology, such as hybodonts. Shark-like chondrichthyans such as Cladoselache and Doliodus first appeared in the Devonian Period (419–359 Ma), though some fossilized chondrichthyan-like scales are as old as the Late Ordovician (458–444 Ma)

Also, prior to vascular trees evolving, there were other tree-like plants and fungi that existed on land, and also trees have evolved independently possibly hundreds of times because they are not a monophyletic clade like sharks, but are instead represented in clades across all vascular plants

christophski OP ,

The best way to get the right answer on the Internet, is not to ask a question, but to post the wrong answer 😄

Chickenstalker ,

Well, yeah. Life began in the oceans and sharks were one of the first fishes. Land organisms evolved much later.

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