Which of the following describes osmosis?
a. oxygen transfers into red blood cells through small gaps in the cell membrane from the oxygen- rich environment surrounding the cells
b. large molecules are brought into the cell by wrapping the cell membrane around the molecules to form a vacuole.
c. water moves across the cell membrane from the side with high osmotic pressure towards the side with low osmotic pressure.
d. membrane proteins provide a pathway for larger particles to move across the cell membrane and bring the cell and environment closer to equilibrium.

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area

Which situation is an example of not doing work? lifting a couch throwing a baseball running up stairs carrying a box

The table below shows data for a population of fish in a pond. fish body color # of fins scales? tail shape a silver 4 yes fan b pink 4 yes flat c black 4 yes fan d orange 4 yes flat e orange 4 yes fan f silver 4 yes flat which of the above characteristics would be most in developing a classification system for the fish? a. body color and tail shape b. presence of scales and tail shape c. body color and number of fins d. number of fins and presence of scales