<span>In the past, human populations were controlled by </span>Disease and Famine
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.
Globalized evolution...... but I might be wrong
Answer:
The crust
Explanation:
The solid, outer layer is called the crust.