The concentration of calcium inside a cell is 0.3%. the concentration of calcium outside the cell is 0.1%. how could the cell transport even more calcium to the inside?

Which is the correct order in the scientific process? ask a question ® form a hypothesis ® make an observation ask a question ® make an observation ® form a hypothesis make an observation ® form a hypothesis ® ask a question make an observation ® ask a question ® form a hypothesis

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

In which way are mercury and venus similar? they both rotate from east to west. they are both small and rocky. they both have thick atmospheres. they both are similar to earth in structure.