A potential cause of male infertility is a blockage of the vas deferens. The blockage could be due to the build up of scar tissue along the vas deferens. What medical treatment would most likely be used to treat this type of infertility?

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer

This is the process of making a prediction based on the results of prior observations of similar events.

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing