Sandra examined some animal cells using a compound microscope. Under normal conditions, the cells have an approximate salinity of 1 M NaCl and resemble the slide shown in picture 1. If the cells are submerged in a 0.8 M NaCl solution, what will happen to the cells?
A.
Water will move into the cells and they will swell as in picture 2.

B.
Water will move into the cells until they swell and burst as in picture 4.

C.
Nothing will happen; they will look the same as in picture 1.

D.
Water will move out of the cells and they will shrink as in picture 3.

Coral reefs support more species per unit area than any other marine environment on earth. what is one way coral reefs are important to the health of the biosphere

The leopard frog and the pickerel frog are two closely related species. in areas where their ranges overlap, the frogs will remain separate species if they

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