13. A change in pH is able to cause protein denaturation because
a. The amino group is sensitive to OH-
b. The molecules startmoving so rapidly that they come apart

c. Water is neutral.
d. It causes the areas that were hydrophobic to become hydrophilic

e. The primary structure changes when the [H+] changes

Which of the following is a cause of a dna mutation? o a. the linking of amino acid subunits into a long chain o b. the transcription of dna into rna o c. an error in the repair of damaged dna d. the diffusion of molecules across the cell membrane submit

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 of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above