QUESTION 1 Which of the following is TRUE? Electrolytes freely move across cell membranes. Water and electrolytes move across the cell membranes only through protein channels. Water freely moves across cell membranes. Water and electrolytes cannot move across cell membranes.

4. If a farmer over-hunted a population of insect-eating birds, what immediate change would likely be seen in his land?

7. The European rabbit (an herbivore) was introduced to Australia in the 1800 s. It has no natural predators in the continent and breeds very quickly. Which of the following is a negative impact that resulted from the introduction of rabbits to the Australlan ecosystem?

8. Wolves are at the top of the wolves all but disappeared from Yellowstone. Which of the following was a likely effect of the wolves' disappearance?

6. A forest is being cleared for a new housing development. What would be an expected outcome of this environmental change?

How does a developing fetus change in the third trimester? A. It becomes male or female. B. It grows in size. C. It grows hands and feet. D. It develops eyes.