no, but you do capitalize mum
No, because it isnot a propernoun.
Yes, "Day" should be capitalized in Mother's Day as it is a specific holiday and part of the proper noun.
No it shouldn't be capitalized.
I cannot think of any sentence that you would capitalize the word cub.The cub slept with its mother. The bear had three cubs.
my father is a democrat but my mother is a republican
No, because it is n ot a proper n ou n.
No, only when it is used as part of the proper noun. Examples: I want to see Mother Theresa in person. My mother cooks dinner everyday.
Yes, "Mother" should be capitalized when writing "Thank you in memory of Mother" as a sign of respect and to convey the importance of the relationship.
Capitalize words such as Mother, Father, Grandmother, Grandfather, Son, Daughter, and Sis when they are used in place of the person's name. Do not capitalize them when they follow possessive pronouns such as my, your, his, her, our,or your. Examples: I will ask Father. I will ask my father.Exceptions for religious purposes: Our Father... or How are you, Brother Michael?
Mom can be both a proper and a common noun.When using the expression in lieu of a name (proper noun) then it would be capitalised, e.g. " Let's go to a restaurant for Mom's birthday"; "That's Mom's favourite dress".When using the term simply to mean "a mother" then it would not be capitalised, e.g. "we went to a restaurant for my mom's birthday"; "That's my mom's favourite dress".
the T in tide and the first letter
If you are talking about your own mother and you call her Mom as a name, capitalize it because you are using it as a proper name. If you talking about Luke's mom's something-or-other, don't capitalize mom because you are using it as a common noun.