What two or more body systems are used in these activities and how are they involved? a. playing a video game. b. getting energy to sit through class by eating cereal and a banana. c. going through puberty. d. touching a hot pan and yanking your hand away. e. jumping up and down. f. drinking water on a hot day. g. sneezing. h. blushing. i. hitting your head on the top of the car as you get into it. j. breathing harder during a jog.

Photosynthesis converts light energy to chemical energy. which molecules are the end product of this transformation of energy in this reaction?

Over the past 60 years, many amphibian species have experienced significant population declines and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. chytridiomycosis is a fungal disease first identified in 1998 as a cause of massive amphibian deaths. in some severely impacted populations, a few individuals have survived, perhaps because of some natural resistance. if these resistant individuals continue to survive and prosper, new resistant populations might emerge. this would be an example of the founder effect artificial selection genetic drift natural selection sexual selection

How does an angiosperm prevent self pollination