Ascientist is examining a cell under the microscope. she observes cytoplasm, several ribosomes, a cell wall, a cell membrane, and a region of loose dna. what type of cell is the scientist observing?

Plz will mark! the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

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

What are the subsystem of the earth