After the skin is cut and a capillary wall breaks, what's the first step in working to form a clot?
a. a set of reactions are triggered.
b. thrombin causes sticky fibrin filaments to form the clot.
c. the clot seals the area to prevent further blood loss.
d. platelets clump at the site.

Which of the following words best matches this definition: the process in which the best adapted organisms survive and pass on their traits, while those that are not well adapted do not survive to pass on their traits. question 3 options: acquired selection natural selection artificial selection organic selection