Why are diploid cell cultures preferred over continuous cell cultures

The development of_ factored in the development of complex organisms.

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

Which example would the nurse consider to be a part of systems thinking theory?