(07.02 hc) a certain type of heart-muscle disease thickens the heart muscle so that the heart chambers shrink in size. how would this disease affect a person over time, as the volume of the heart chambers continues to shrink? (2 points) the person would become more alert and anxious over time because the enlarged heart muscles would pump more blood to the brain than before the disease progressed. the person would develop low blood pressure and feel faint because the heart will be pumping less blood with each heartbeat. the person would become more tired and weak because the volume of oxygenated blood pumped with each heartbeat would decrease over time. the person would develop high blood pressure because the thicker heart muscles and smaller heart chamber volume would cause more pressure in the heart.

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?

In the practice of science, this type of reasoning is used to develop explanations.

Ascientific idea becomes valid when it is what?