What is an ETF? An ETF (Exchange Traded Fund) is a diversified collection of assets (like a mutual fund) that trades on an exchange (like a stock). ETFs are an easy-to-use, low cost and tax efficient way to invest your money. iShares Core ETFs have outperformed more than 75% of their mutual fund peers on average over the past 5 years1.
The Invasion of Land. Early vascular plants, collectively known as rhyniophytes, first appeared in the late Early Silurian and diversified considerably through the Late Silurian.rthropods are the most diverse group of animals on Earth and include insects, crustaceans, arachnids, myriapods, and onychophorans as well as extinct forms like trilobites. eurypterid. Any member of an extinct order (Eurypterida) of mostly aquatic, scorpion-like arthropods that were common in the early Paleozoic.
The forest biome. About 420 million years ago, during the Silurian Period, ancient plants and arthropods began to occupy the land. Over the millions of years that followed, these land colonizers developed and adapted to their new habitat. The first forests were dominated by giant horsetails, club mosses, and ferns that stood up to 40 feet tall. Life on Earth continued to evolve, and in the late Paleozoic, gymnosperms appeared.