Two students design an experiment to see if pushing or pulling is more effective. They set up a 10 foot course. The first student pushes a heavy book down the course and the other times how long it takes. The students then switch roles and the second student
pulls the box back along the same course as the first student times. They repeat this 5 times. Describe the quality of the design of
this experiment.
A)
This is a well designed experiment.
B)
This is not well designed because 10 feet is too long.
C)
This is not well designed because they should not switch roles.
D)
This is not well designed because they should repeat it 5 times.

The collared lizard is a species found in the desert southwest. male collared lizards show considerable color variation, ranging from brightly colored to a very dull pattern. your goal is to determine the function, if any, of male color patterns in collared lizards, using the scientific method. your tentative explanation is that male color plays a role in attracting females for mating purposes. you predict that females will preferentially choose brightly colored males over dull-colored ones. to test this prediction, you observed the interactions of female collared lizards with their male counterparts. you selected males that were the same age and size, and that differed only in their coloration pattern. you placed equal numbers of the two types of male lizards, bright and dull, in aquariums, along with one female lizard per aquarium. out of 350 aquariums observed, the female chose to mate with the brightly colored male 277 times, and the dull-colored male 70 times. in 3 instances, the females did not mate with either type. create a bar graph of your data, plotting the type of male (dull or brightly colored) on the x-axis. on the y-axis, plot the frequency with which each type of male was chosen by females. using this graph, answer the following question(s). is it reasonable to conclude (i.e., is it supported by the data) that female collared lizards prefer more brightly colored male lizards over dull-colored males?

Which of the following best describes the relationship between glucose and complex molecules such as hormones?

Nkentucky, intoxicating beverages (beer, whiskey, wine, etc.) are involved to some extent in approximately % of collisions fatal to pedestrians.