Homeostasis is controlled by what feedback mechanism? how does it work?

Compare the depth of field when focusing with low power and high power. which power has the greater depth of field?

Abody cell has been growing and at synthesis proteins.in the nucleus of this body cell,dna replication is taking place. and a copy of the cells genetic material is copied.which of the following is the best conclusion you can make about the life cycle of this cell ? a) the cell is ready to undergo mitosis.and a chemical signal will send the cell to prophase b)the cell is undergoing meiosis and will cross over the genetic material next c)the cell is in the s phase of interphase and will move next to the g2 phase d) the cell is in the g2 phase of the interphase and is ready to begin diving

How do all types of diffusion/passive transport actually ‘work’ without using even the smallest amount of cellular energy?