what are some flora found here?
Although there were a variety of macroscopic marine plants no land plant (embryophyte) fossils are known from the Cambrian.
Cambrian
Although there were a variety of macroscopic marine plants no land plant (embryophyte) fossils are known from the Cambrian. 
in which evolutionary force does competition play the biggest role UNANSWERABLE what is apex predator? An apex predator, also known as an alpha predator or top predator, is a predator at the top of a food chain, without natural predators. how is it conserved? By reintroducing them to nature . what effect does it have on community? Apex predators affect prey species' population dynamics and populations of other predators, both in aquatic and in terrestrial ecosystems. what is its history in evolution? Apex predators are thought to have existed since at least the Cambrian period, around 500 million years ago. what is this aforesaid period? It was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. what are its divisions? The Cambrian is divided into four epochs (series) and ten ages (stages).
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Cambrian [SEP] Flora
Although there were a variety of macroscopic marine plants no land plant (embryophyte) fossils are known from the Cambrian. However, biofilms and microbial mats were well developed on Cambrian tidal flats and beaches 500 mya., and microbes forming microbial Earth ecosystems, comparable with modern soil crust of desert regions, contributing to soil formation.