An experiment is designed to study the mechanism of sucrose uptake by plant cells. cells are immersed in a sucrose solution, and the ph of the solution is monitored. samples of the cells are taken at intervals and their sucrose concentration measured. the ph is observed to decrease until it reaches a steady, slightly acidic level, and then sucrose uptake begins. (a) evaluate these results and propose a hypothesis to explain them. (b) predict what would happen if an inhibitor of atp regeneration by the cell were added to the beaker once the ph was at a steady level? explain your thinking.

Refer to this portion of a dichotomous key for fish identification to answer the question. 1. (a) has a single dorsal fin ® 5 (b) has a double dorsal fin ® 2 2. (a) one fin is spiny, the other is smooth ® 3 (b) one fin is not spiny or smooth ® 4 5. (a) has small fin on back near tail ® 6 (b) has no fin on back near tail ® 7 6. (a) has barbs near the mouth ® catfish (b) does not have barbs near the mouth ® 10 7. (a) tail is asymmetrical ® 8 (b) tail is symmetrical ® 9 10. (a) scales are small ® trout (b) scales are large ® whitefish what is the next step to complete to identify a fish that has a single dorsal fin, no fin on the back near the tail, and no barbs near the mouth? step 2 step 5 step 7 step 10