Q1. Signals carried by hormones must eventually be terminated; response continues for a limited time. Examine two different mechanisms for signal termination, using specific systems as examples.

Q2. If a favourable trait increases the lifespan of organism without affecting reproductive success does evolution happen? Give details.

How do both meiosis and sexual reproduction (fertilization) produce offspring that differ genetically from the parents? Be sure to talk about the two specific steps in meiosis that increase variability as well as process of fertilization.