There are three main checkpoints in the cell cycle. Each checkpoint serves a different purpose and have their certain cyclins present. At the G1 checkpoint, a cell undergoes certain conditions to see if it is prepared for cell division. If a cell receives restrictions from the G1 checkpoint and can not continue into the next phase, what could the cell do next?
A) All cells pass the G1 checkpoint and enter into the next phase.
B) The cell can enter the G0 (resting stage) until conditions can improve.
C) The cell will always go directly into the G2 checkpoint to continue the cell cycle.
D) The cell will directly enter the M phase and all of the errors will be fixed during this phase.

B

Explanation:

it will go into G0 until conditions improve. If they dont it will go through apoptosis

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.