Invertebrates are animal genus that lack or do not build up a spinal column. They account for the largest percent of all the living species. The first animals to have evolved were invertebrates. Data from fossils collection shows that invertebrates were there 600 million years ago. Some paleontologists propose that invertebrate animals emerged much earlier probably one billion years ago. Trace fossils such as burrows and tracks established in the Tonian age signify the presence of triploblastic worms approximately as large and complex as earthworms. Animals began diversifying at around 453 MYA, and many of the essential groups of invertebrates ...
Amphibians Research Papers Samples For Students
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EXECUTIVE SUMMARY
Sustainable forests are managed effectively in order to preserve the ecosystems and the forest. The ecological systems that are reliant on the forest are the streams, watershed and the species that inhabit within the environment. The forest is a working environment that can be harvested for the production for paper and pulp products. The sustainable forest management is an outcome of applying the forest to the benefit of all while conserving the ecological systems that are reliant of the forest. Healthy streams are reliant on the forest for their coverage. The forests also enable the lowing of the temperature in ...
Abstract
The Great American Interchange lasted for about two million years between North America and South America. The objective of the essay is to look at the symmetrical results of the great American interchange in the beginning and how the interchange became asymmetrical after time progressed. The unbalanced nature of the interchange offers a model to explain the asymmetrical results of the land-mammal interchange between the two Americas. Both Geological and biological data are looked into the get insights the past and present distributions of fauna.
Introduction
The Great American Interchange is a crucial paleo zoogeographic event that occurred between North America and ...