Sexual reproduction in plants 5th grade. Agriculture Because of that, it easily occupies new territories and acts as an invasive species. Largest species of horsetail can reach 6 feet in height. Unsorted Videos 0. From eHow. Embed Video: Look inside a tree to learn about the xylem, cambium, and phloem, and to see how the tree's rings provide a record of the environmental factors that affected its growth and life cycle. Very harshly-worded criticism of content will also be deleted promptly. Because of that, it easily occupies new territories and acts as an invasive species. Umwelt is defined as "the world as it is experienced by a particular organism.