What are the threadlike proteins that attach to platelets in blood clotting?

Use this diagram of an animal cell to answer the question. where does the first stage of cellular respiration occur? w x y z

The use of dna as evidence in criminal investigations became possible because of the

Most of the fossils found in virginia are in the coastal plain, valley, ridge, and appalachian plateau regions, best suggesting that these geographic provinces a) were once covered by seawater. b) are the oldest parts of virginia. c) have a great deal of karst topography. d) have large amounts of sedimentary rock.