Item 4 Sulfur has 6 electrons in its outermost energy level. In ionic bonding, it tends to do which of the following?

Which of the following are causes of coastal erosion? check all that apply. beach grasses and other plants trap windblown sand. wave action carves away the coastline. groundwater under pressure is forced to earth’s surface. artificial structures stop the natural flow of sand along the coast. underground caves collapse as bedrock is dissolved.

Human genes only differ by less than percent. a. 1 b. 6 c. 11 d. 16

Which of the following is a limitation of a clinical trial? a.)amount of random assignments b.)hospital cost c.)number of test tubes d.)amount of peer review