Which of the following is an example of a renewable resource a. cotton b. copper c. natural gas d. coal

What are antigens and antibodies? how are they involved in the body’s response to incompatible blood?

Ihave no idea how to solve these. plus there's another question that is 2) a 10 kilogram meteorite is collected in space and brought back to earth. it is composed of 1.25 kg of uranium-238 and 8.75 kg of lead-206. how many u-238 half lives have passed? what is the approximate age of the meteorite?

What goes in and out of a cell respiration?