Suppose that you conduct an experiment in which you test whether the fertilization envelope forms and polyspermy occurs under the following conditions: control group: an unfertilized sea urchin egg is left untreated (no ca2+ channel blockers added). then sperm are added. experimental group: ca2+ channel blockers are added to an unfertilized sea urchin egg. then sperm are added. drag the labels (yes or no) to predict whether or not the following events can occur under control conditions and experimental conditions.

What term describes a doctor who becomes a specialist by meeting standards beyond those of getting a license and passing a test in the specialty area?

Explain in your own words what caused pangea to separate and why we don't worry about earthquakes in florida.

Which of the following is true? a. under the current unemployment insurance system, benefits replace about 90 percent of the typical worker's prior pretax earnings. b. high benefit payments to unemployed workers will tend to increase the rate of unemployment. c. if a system of personal savings accounts replaced the current unemployment benefit system, the unemployment rate would fall to zero. d. the rate of unemployment in the large european economies has been persistently lower than that of the united states due to their more generous unemployment benefits.