animalia
Red mangrove belongs to the Plantae kingdom.
Plant kingdom
None of those is a main sequence star.
Red blood cells belong to the kingdom Animalia. They are a type of cell found in vertebrates, which are animals characterized by having a backbone. Unlike other cells, red blood cells lack a nucleus and are primarily responsible for transporting oxygen throughout the body.
I don't know about blue giants, but red giants are at the end of a star's life.
The answer to that question varies depending on the type of algae. Blue Green algae belongs to Monera Unicellular algae: Protista Multicultural algae the most common such as Red, Brown, and green algae belong to the Metaphyta (plantae) kingdom
Red algae belong to the kingdom Protista. They are multicellular, photosynthetic organisms that typically live in marine environments. Red algae have a range of forms and sizes, from simple filamentous forms to large, complex seaweeds.
Giant Sea Star (Pisaster giganteus) a/k/a Knobby Sea Star. Detail of the arm tip showing the optic cushion or "eye spot". Most sea stars have such a cluster of red-pigmented, light-sensitive cells at the tips of the arms. These optic structures do not actually form an image in the manner of a mammalian eye, but do allow the sea star to detect light and sense changes in its environment. Pillar Point.
Barnard's Star and Mira are both well-known stars in astronomy. They are red dwarfs that belong to the Milky Way galaxy. However, Barnard's Star is a relatively nearby star, while Mira is a variable star known for its fluctuating brightness.
The red fox is a mammal, and all mammals belong to the taxonomic domain of Eukarya.Eukarya covers all organisms in the Kingdom Animalia, as well as the Kingdoms Plantae, Fungi and Protista.
All species of oak trees are plants, and all plants belong to the taxonomic domain of Eukarya, which are characterised by having cells with nuclei. Eukarya covers all organisms in the Kingdom Plantae, as well as the Kingdoms Animalia, Fungi and Protista.
Red onions belong to the domain Eukarya, as they are eukaryotic organisms. Within this domain, they are classified under the kingdom Plantae, which includes all plants. Specifically, red onions are part of the family Amaryllidaceae and the genus Allium. They are widely cultivated for culinary uses due to their distinctive flavor and color.