The half-life of a radioactive elements such as carbon 14 is the time it takes for half of the Atoms to decay. how many half life periods have passed if a fossil contain 1/32 of The original amount of time of carbon 14?

Where are the following

The first means of speeding up reactions mentioned by the speaker is raising the enzymes 

The rate that would change would be the  searching efficiency/attack rate. there are only two other rates in this model: the  growth rate of prey, and the  predator or consumer mortality rate.the  searching efficiency/attack rate is what indicates how effectively can a predator capture its prey whether in the searching process or actual capturing/attacking process.