How does population density affect the environment and natural resources

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.

What structure on the south african coast has a range of 63 km and releases flashes every 30 seconds?

In the diagram below, ab and bc are tangent to o. what is the measure of