Since the alligator population decreased, this means there are less predators for the gar. Less predators for the gar mean the gar population will increase. More gar means more predators for the crabs, and therefore decrease the crab population. More gar also means more competition for the diving duck in terms of animals that eat crabs, and thus the diving duck population will also decrease.

1920 census

the census was scheduled for january the 1st, as the government believed that more farmers would be in their homes by that time instead of april. the census did not ask about unemployment, the number of children, and how long was a couple married were not taken into consideration. individuals were considered as residents of the places they normally slept, not the places were they worked at or visited.

2010 census

the census was scheduled for april 1st, 2010. it was the shortest census in history: it only contained 10 questions related to name, age, gender, ethnicity, relationship, and whether the citizen owned a home or rented one. the government launched a website in order to provide the citizens with information regarding the census. there were also "teach census weeks" in schools nationwide.

answer: not really

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open to spam anyone can edit it requires internet to collaborate.

the advantages of wikipedia are

anyone can editeasy to learn frompeople from other countries can share the same document