Answers

  1. As cell diameter increases, surface area to volume ratio decreases

This is because cell diameter increasing means cell volume is increasing, so SA:V ratio is smaller, as volume increases at a larger rate than surface area, and you are dividing by a larger number

  1. valid points include:

- occurs through the semipermeable membrane of cells

- the movement of water molecules from an area of high concentration to low concentration

- the diffusion of water down a concentration gradient

- water moves from the hypotonic environment to the hypertonic

- hypotonic- lower concentration of solute than another solution. higher concentration of solvent (water)

- hypertonic- higher concentration of solute

- no energy is required, it is a passive form of transport

  1. valid points include:

  • surrounded by a double membrane

  • contains a dense nucleolus

  • contains DNA in the form of chromatin, wrapped around histone proteins

  • the nuclear membrane has pores that allow for the transport of genetic material through the cell