Most vaccines protect only against pathogens that fall within a certain region of antigenic space. Suppose that a vaccine protects against any strain falling within a sphere of radius 2 centered at thepoint (2,1,0) in antigenic space. For each strain, determine whether this vaccine will be effective.(a) A strain located at (0,0,0) in antigenic space(b) A strain located at (1,0,3) in antigenic space(c) A strain located at (1,0,1) in antigenic space(d) A strain located at (1/4,2,1) in antigenic space

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

Which sequence correctly shows the path of carbon dioxide during repiration?

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.