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.
By now you should have a good understanding of the advantages and challenges faced by plants living on land. 1  The previous tutorial introduced you to the adaptations to terrestrial environments seen in plants. Now you will examine the nonvascular plants, the most primitive of the living plants lineages, and the seedless vascular plants, which in addition to a waxy cuticle and stomata, have a well-developed vascular tissue. By the end of this tutorial you should have a working understanding of: 1  The distinguishing characteristics of nonvascular plants and their life cycles. 2  The three groups (mosses, liverworts, hornworts) of nonvascular plants. 3  The evolution of seedless vascular plants. 4  The importance of vascular tissue. 5  The advantages of a dominant sporophyte.