No it does not have to be capitalised.
Yes, Siamese would be capitalized.
Depends on where you put it in a sentence
Earth, as in we live on the planet Earth, is supposed to be capitalized. Earth, as in the dirt we walk on, is not supposed to be capitalized.
It depends on the context of the sentence. If being used as in "He is a senior in college" then you do not capitalize. If used in conjunction with a proper noun, then it is capitalized.
If it's at the very BEGINNING of the sentence, yes. If it's IN the sentence but NOT at the beginning, no.
Yes, Siamese would be capitalized.
If its at the beginning of a sentence then yes. But if its during a sentence then no.
Only at the beginning of the sentence.
Depends on where you put it in a sentence
No, it would not be capitalized, but it should be pluralized.
No, except if the word is used at the beginning of a sentence.
No, the C in colonial does not need to be capitalized.
No, except at the beginning of a sentence because it is not a proper noun.
No, except at the beginning of a sentence because it is not a proper noun.
No, it's a common noun so you only capitalise at the start of a sentence.
Earth, as in we live on the planet Earth, is supposed to be capitalized. Earth, as in the dirt we walk on, is not supposed to be capitalized.
It depends on the context of the sentence. If being used as in "He is a senior in college" then you do not capitalize. If used in conjunction with a proper noun, then it is capitalized.