A researcher wants to measure the effectiveness of a 3-month high protein meal plan on the performance of 14 runners. The runners run two different lengths of 3 miles: one prior to starting the 3-month high protein meal plan and one after eating the high protein meal plan for 3 months. The difference in run times between the run prior to the diet and the run after the diet was recorded for all 14 runners.  The data obtained should be analyzed using which method?

All of these are benefits of having a diapsid skull EXCEPT:

There are 7 fossils that show the transition from aquatic to terrestrial living. The most recently discovered and most important of these fossils, because it shows the transition from aquatic to terrestrial living, is:

Which two statements regarding feedback loops are correct?

Which statement regarding the fitness of coyotes compared to the fitness of shrews is scientifically accurate?

In what way can endotherms such as mammals dissipate heat, such as during periods of extreme heat?

Most animal cells are organized into tissues that are made of at least one cell type organized to perform specific functions. In animals, at least two tissue layers are present, but most animals have a third tissue layer from which the inner organs develop, known as the:

The ___ allowed ___ the ability to exploit new habitats further inland and away from water sources

Which phylum includes aquatic, sessile animals that lack symmetry, true tissues, or organs and are commonly shaped like columnar vases?

In what way can ectotherms such as reptiles and insects maintain their internal body temperature?