Some invertebrates in antarctica have which compound in their blood to protect against the cold

Which of the following is true about fossils? a. the relative age of fossils cannot be determined from their position in sedimentary layers. b. fossils found in lower layers of sedimentary rock are as old as fossils found in upper layers of sedimentary rock. c. fossils found in upper layers of sedimentary rock are older than fossils found in lower layers of sedimentary rock. d. fossils found in lower layers of sedimentary rock are older than fossils found in upper layers of sedimentary rock.

Which of the following is also known as the eastern european plain and stretches from eastern poland to the ural mountains? russian plain? west siberian plain? central siberian plateu? eastern highlands?

What is unique about obtaining water from an artesian well?