Your sick puppy is diagnosed with roundworms. They grow inside of the puppy. What type of symbiotic relationship do the puppy and the roundworms have? A. Cooperative
B. Commensalism
C. Mutualism
D. parasitism

sodium (na), for example, has one electron in its valence shell. this is an unstable state because that valence shell needs eight electrons to be full. in order to fill its valence shell, find a way to add seven electrons to its valence shell

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.