A developmental biologist has transplanted some mesenchyme from underneath the apical ectodermal ridge (AER) of the forelimb bud from one embryo and moved it underneath the AER of the hindlimb bud of another embryo. Which of the following would you expect to from this surgically altered limb bud in the embryo that received mesenchyme? A. An appendage that is proximal leg and distal wing
B. There is a leg where you expect a wing.
C. An appendage that is proximal wing and distal leg
D. There is a normal wing and leg.

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation:

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

well, i believe that the answer is 2. : 3