1. movement of material across the cell membrane with energy
2. the environment outside of the cell has a lower concentration of dissolved material than the inside of the cell. this causes the cell to swell, and it may even burst.
3. a difference in the concentration of a substance across a distance
4. movement of material across the cell membrane without energy
5. the environment outside of the cell has more dissolved material than inside of the cell. if a cell is placed in a this type of solution, water will leave the cell. this can cause a cell to shrink and shrivel (crenation).
6. the movement of particles from regions of higher density to lower density regions
7. diffusion of water across a selectively permeable membrane
8. concentration of a substance is the same throughout a space
9. a solution in which the amount of dissolved material is equal both inside and outside of the cell. water still flows in both directions, but an equal amount enters and leaves the cell.
10. the movement of large molecules through a membrane protein channel along the concentration gradient.
Which group of algae is characterized by unicellular organisms and includes some members that would be better classified as zooflagellates? euglenophytes red algae sporozoans green algae
In 2001, records showed that local stocks of fish were down worldwide. yet, records of harvests indicated that fish were being taken at records rates. what was actually happening?
Match each description of an object’s motion with the position-time graph that represents it. not moving moving with constant speed speeding up slowing down
Mercury metal is poured into a graduated cylinder that holds exactly 22.5 ml the mercury used to fill the cylinder mass in 306.0 g from this information calculate the density of mercury