what are some animals found here?
Bryozoa.
Cambrian
nvironment that now offered new ecological niches. Around the same time there was a seemingly rapid appearance of representatives of all the mineralized phyla except the Bryozoa, which appeared in the Lower Ordovician. However, many of those phyla were represented only by stem-group forms; and since mineralized phyla generally have a benthic origin, they may not be a good proxy for (more abundant) non-mineralized phyla.
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). 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. what is the life in the ocean like? Most animal life during the Cambrian was aquatic with arthropods being the most dominant animals in the ocean.
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Cambrian [SEP] Oceanic life
500 million years ago, oxygen levels fell dramatically in the oceans, leading to hypoxia, while the level of poisonous hydrogen sulfide simultaneously increased, causing another extinction. The later half of Cambrian was surprisingly barren and showed evidence of several rapid extinction events; the stromatolites which had been replaced by reef building sponges known as Archaeocyatha, returned once more as the archaeocyathids became extinct. This declining trend did not change until the Great Ordovician Biodiversification Event.