Which of the following statements about wings is true?

(a) wings are ancestral in bats, but derived in birds.
(b) the common ancestor of birds and turtles most likely had wings.
(c) wings are an ideal characteristic to use when constructing a phylogenetic tree.
(d)the arrangement of bones in bird and bat wings (forelimbs) is a homology, but the presence of wings in birds and bats for flight is an analogy.
(e) wings evolved in the common ancestor of the sauropsids & mammals, but were subsequently lost in all groups except bats and birds.

Actinobacteria sp. are fermenting organisms (which do you use oxygen to breathe) referred to as chemoorganohetereotrophs this means they break down organic material and convert it to inorganic material. which part of the carbon cycle does this describe

Iwanna go do something with my ideas? ?

Subduction zones form when an oceanic plate collides with another oceanic plate or continental plate. the continental crust is lighter and less dense than oceanic crust. continental crust's density is approximately 2.7 grams per cubic centimeter. oceanic crust is thinner and the average density is about 3.3 cubic centimeters. when the two crustal plates converge the oceanic plate always bends and subducts beneath a continental plate. once the oceanic crust subjects, the rocks are subjected to changes in heat and pressure. because of this, we would expect to find rocks in the area of a subduction. a) clastic b) igneous c) metamorphic d) sedimentary