Which of the following is NOT an example of a biological process in a geochemical cycle?
1. Cellular Respiration
2. Transpiration
3. Erosion
4. Photosynthesis

Which is a function performed by stem cells in the skin a. replacing lost skin cells b. making cells for the intestines c. growing new organs d. differentiating into brain cells plz apex

What materials must dams have to produce electricity, and what must occur?

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?