Roberta made a chart of rocks and minerals. which of these can be placed in the column labeled minerals? a) can contain a fossil b) made of just one substance c) made of at least two substances d) can be made of tiny grains of sand

What is the relation ship between structure and function in an organism

Amniocentesis is a process in which amniotic fluid is taken from the mother's womb to identify any genetic abnormalities in the fetus. how would the discovery of the human genome contribute to this process?

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