Checkpoint 3 Checkpoint 2
M M
G2
G1
Checkpoint 1
S
Go
Figure 1. Diagram of the cell cycle with key checkpoints
Which of the following describes a mutation that would lead to an increase in the frequency of nondisjunction?
A mutation affecting checkpoint 1 proteins that forces cells to enter G0

The answer is c the potato slice shriveled because water moved out of the slice into the salt solution

It depends on the surface of the levels. the rougher the surface, the greater is the frictional force. for rougher surfaces, you would need to exert greater force to move the object. the concept is that, you must overcome the frictional force in order to bring the object into motion. this is the reason why we add lubricants to the joints so they could easily move. this answer was on