In the cell cycle, external regulators direct cells to
• A. speed up or slow down the cycle
•B. Remain unchanged
•C. Proceed and then stop the cycle
• D. Grow uncontrollably

six grader is what i am ssorry

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.

i believe it's c. the trait for large beaks will be passed on to future generations through natural selection.

since eventually smaller beaks would have to find another source of food or even eventually just die out from the lack of food.