Choose all the answers that apply. which of the following minerals can be scratched with a fingernail?
-talc
-diamond
-topaz
-quartz

Which type of respiration takes place when there is no oxygen present

Does anyone know what a poms statement is for biology? i don't know what it is and i have an assignment on it tomorrow, will award the best answer a brainliest!

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