Scientists wanted to determine the levels of pollution that a fish could withstand. They placed fish in tanks with different pollution levels and timed how long they could live under those conditions. What is the dependent variable? What is the independent variable?

Which of the following occurs after a natural or unnatural disturbance in an ecosystem

Migration is a. the movement of organisms from a native location to a foreign location b. the movement of organisms from a foreign location to a native location the movement of organisms from their water supply to their food supply d. the seasonal movement of organisms between locations c. select the best answer from above

Yeast cells reproduce quickly by budding. this is a form of reproduction so all the yeast cells a) sexual; vary b) asexual; vary c) asexual; are identical d) sexual; differ from the parents submit hint structures and functions of cells cellular reproduction