Which group in subphylum vertebrata is most closely related to class amphibia?

The study of interaction between living organisms and their enviroment is called (a) phytogeography (b) ecology (c) phytosociology (d) ecosystem

Microorganisms are involved in each of the following processes excepta. smog production. b. food production. c. infection. d. o2 production. e. decomposition of organic material.

Check all that apply diatoms are marine algae that have a shell made of silica, what are some of the uses of the silica shell after the diatoms die? 1.the shells make up the diatomaceous earth used in filters 2.it can be used as an ingredient in abrasives 3.they are used in food products 4.the shells can be used in some insulating materials