Explain the difference between gills and lungs give examples of animals that only have lungs and animal that have both gills and lungs. What are the advantages of having gills, having lungs, and having both

What is used to keep track of the gamates and possible offsprings combination

The vaccine in a flu shot contains weakened flu viruses. how does a flu shot work with the immune system? a. it destroys lymphocytes. b. it destroys macrophages. c. it activates macrophages. d. it activates lymphocytes.

The ruiz family is exchanging euros for us dollars. the exchange rate is 1 euro equals 1.35261 usd. since the ruiz family knows that usd are stated to the nearest hundredth of a dollar, they used the conversion ratio