Both are correct in the right context:
.
Zoo's is the possessive form of the singular noun zoo.
Example: The zoo's head keeper has resigned
Zoos is the plural form of zoo. eg We have three zoos in our city.
Zoos' is the possessive form of the plural noun zoos
Example: All of the zoos' keepers meet every month.
The word zoo's is the singular possessive (refers to one zoo).The plural is zoos and the plural possessive is zoos' (e.g. The zoos' directors agreed to merge them into a single state corporation.)
The noun 'zoo' is a singular, common noun, a word for any zoo. The proper noun for zoo is the name of a zoo, for example The Smithsonian Zoological Park (aka National Zoo) or the San Diego Zoo.
a lion can kill another animal that is bigger
If you are talking about zoos in general, then no, it should not be capitalized. However, if you are talking about a particular zoo then it should be capitalized. An example would be: We went to the San Francisco Zoo today. This sentence is written with correct punctuation.
You might use a toothbrush. You might use soap. You might use a sponge. You might use a towel. You might use a facecloth. You might use a facewash. You might use water.
There are many good zoos in the world.
By studying zoos
Some zoos have goats but not all zoos.
le'zolatuase zoo
Yes of course it has zoos.
The plural of zoo is zoos. The plural possessive form of zoos is zoos'.
The percentage of people going to zoos then going against zoos is about 32% of the population. You're welcome
150 zoos in california
Three zoos
20 zoos are in kansas
At some Zoos they do.
They aren't.