Answer (three definitions, where two are biology and one is geology):
1) (biology) <u>Of or pertaining to polygenesis; polyphyletic.</u>
2) <u>relating to or determined by polygenes.</u>
If you don’t know what a polygene is: A polygene or multiple gene inheritance is a member of a group of non-epistatic genes that interact additively to influence a phenotypic trait.
3) (geology) <u>One which is composite, or consists of two or more monogenetic ranges, each having had its own history of development.</u>
how do animals obtain oxygen? animal cells exchange oxygen and carbon dioxide with their surroundings by diffusion across the puter coverings or membranes of cells.
