Answer: It is because it makes it more efficient to study organisms.
Explanation: Biologist classify organisms by considering similarities between them. The organisms which have closely related characteristics are placed in a separate domains by biologists. Domains are further divided into 6 Kingdoms. According to modern classification system, domain is largest unit of biological classification.
Dolphins sleep with one eye open
Janelle should talk to any trusted adult for advice. I'm assuming she can't just get her local physician any time she wants to talk to them. Someone else who drinks is not reliable. The people at the party will probably drink too.
The answer is B, sameness