Well, b = -12 and here's how:
b + 15 = 3 (Subtract the 15 over)
b = -12
Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together.
The first triploblastic phylum is Platehelmenthis
Answer:
<h3>As per the hints most applicable is a check that chromosome replication has been successfully completed this is because chromosome replication does not occur until after G1. Actually this checkpoint is G2.</h3>
Explanation:
During G2 phase cell undergoes rapid growth in size as well as protein synthesis takes place. During this process cell basically prepare itself for mitosis.
I would go with 4 that's what makes the most sense to me, and i just learned about this last year so... I hope this helps good luck..