25 POINTS 1) Carefully pinch a piece of the balloon that represents the diaphragm between your thumb

and forefinger. (If you find this to be difficult, use a piece of tape to attach a small piece of

paper to the center of the balloon to use as a handle.) Gently pull the "diaphragm" downward.

What happens to the "lung?"

2) Use the model a few times to demonstrate the process of ventilation. Hopefully you see the

lung expand and fill with air, even slightly. (If you don't, check that everything on your model is

airtight and try again.) Why does this happen?

3) List at least two ways that this model differs from the “real” lungs in the human body.

Pls write 3 separate paragraphs and label which one is for which question

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

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.

Resperation is a way to release carbon back into the atmosphere