Causes of ALS. ALS is a somewhat diverse and decidedly mystifying disease. In more than nine out of every 10 cases diagnosed, no clear identifying cause of the disease is apparent, that is, patients lack an obvious genetic history, complete with affected family members.
Here is a list of some of the more common varieties, along with fruit and plant descriptions. 1  Aristocrat - this variety features a waxy skin and is medium green in color.  Black Zucchini - very dark green skin and almost white flesh, very common variety of zucchini.
There are a few kinds of zucchini, but the squash are all generally the same. You might see zucchini as classified as âopen habitâ or âdense habitâ, which refers to the way the leaves grow on the bush (sprawling/vine-y or bush-like).