I think its 2, but I'm not sure. I have the same question on my homework, but I don't know. I'm 82% sure its A.
Hope this helps:)
Interbreeding species concept-species concepts is not very useful in defining plant species because some plant groups readily hybridize with other plant groups. The biological species concept holds that organisms are members of a common species if they can interbreed and result in live, fertile offspring. Prezygotic and postzygotic obstacles separate species from one another and prevent mating or the development of viable, fertile offspring. New species emerge through a process called speciation. It happens when populations of a species diverge and become reproductively isolated. When groups from an ancestral population undergo allopatric speciation, it is because of a period of geographic isolation that they diverge into distinct species. When groups from the same ancestral population evolve into distinct species, there is no geographical separation.
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First one is all pp am still doing your second one
Greenhouse gases warm the air near Earth’s surface by absorbing heat emoted by Earth.
Accretionary wedge is formed when sediments accreted to the non subducting tectonic plate at a convergent plate boundary. Materials in the accretionary wedge are usually marine sediments that are scrapped off from the down going slabs of oceanic crust. Elevated regions within the ocean basin are transported towards the subduction zones and accreted to the continental margin.
