Yes, the noun sequoia (plural sequoias) is a common noun, a word for any sequoia tree anywhere.
A proper noun is the name of a specific person, place, thing, or a title; for example:
College of the Sequoias was created in 1926.
College of the Sequoias's motto is 'Preparing students for productive work'.
The motto of College of the Sequoias is 'lifelong learning, and community involvement.'.
No, but there are giant sequoias in Yosemite National Park.
common noun
Common
Common noun
common
Pea is a common noun, and peas is the plural...still a common noun.
A common noun.
Most definitely a common noun.
Camel is a common noun.