The event which takes place during normal fertilization is zygote formation.
<h3>Which event takes place during fertilization?</h3>
The major event which is characteristic of fertilization is zygote, otherwise termed cell formation in which case, the zygote is capable of undergoing cell division to form a new living cell. The fusion of two gametes necessary for fertilization kick-starts several reactions in the egg.
Read more on zygote formation;
brainly.com/question/1151355
#SPJ12
 
        
             
        
        
        
Answer: A group of scientists wants to determine whether a relationship exists between alcohol consumption and certain types of cancer. To this end, scientists provide study participants with a questionnaire asking them how many alcoholic drinks they have per week and what diseases they have (if any). These scientists provide subjects with a similar questionnaire annually (for a decade). These scientists are performing an ASSOCIATION STUDY. 
Explanation: Association study is observational study in different individuals to see if a particular behavioral pattern (such as alcohol consumption) can be associated with certain type of disease (such as cancer). 
Information collected from the questionnaires distributed will be subjected to statistical analysis and conclusion(s) will be made.