Urgent answer asap rick’s class plans to study the effect of eating different breakfast foods on grades in morning classes. students in the class will be the test subjects for the investigation. which of the following would most likely make the results of the experiment invalid? a)half of the students ride the bus to school, and half ride in cars. b)some students eat breakfast two hours before other students do. c)some students miss school during the investigation due to illness. d)all students in the investigation have morning classes in the same subjects.

Two true-breeding pea plants were crossed. one parent is round, terminal, violet, constricted, while the other expresses the respective contrasting phenotypes of wrinkled, axial, white, full. the four pairs of contrasting traits are controlled by four genes, each located on a separate chromosome. in the f1 only round, axial, violet, and full were expressed. in the f2, all possible combinations of these traits were expressed in ratios consistent with mendelian inheritance. (a) what conclusion about the inheritance of the traits can be drawn based on the f1 results? (b) in the f2 results, which phenotype appeared most frequently? what mathematical expression predicts the probability of occurrence of this phenotype? (c) which f2 phenotype is expected to occur least frequently? what mathematical expression predicts this probability? (d) in the f2 generation, how often is either of the p1 phenotypes likely to occur? express your answer as a fraction (example: 3/16).

Which of the following is a testable hypotheses?

Which component in a graph indicates an independent factor? a. y-axis b. x-axis c. scale