Answer:
Protists are eukaryotic organisms that can be unicellular, colonial, or multicellular. They are called Archaea, a separate kingdom (even a separate domain). Almost everywhere like earth's crust, organic matters, water bodies, bodies humans and animals and so on. Archaea inhabit nearly every environment on earth, but no archaea have been identified as human pathogens. Unicellular: Archaebacteria, Eubacteria and Protista.
Explanation:
It is important that it has half because there is a half that comes from each parent. so to equal it all out human gametes have a half set of dna instead of a full set
True if u know that humans are
(15) Label 1 is D
(16) Label 2 is A
(17) Label 3 is B
(18) Label 4 is C