What are the two main cells found in the epidermis

(! ) what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures

Fredrick griffith made a scientific discovery in 1928