Question

human cells contain mitochondria, which are responsible for processing the energy needed by our cells. remember that the ancestors of mitochondria may once have been free - living prokaryotes. if mitochondria were still considered separate organisms within human cells, which of the following would best describe the relationship with them?
parasitic
mutualistic
competitive
pathogenic

Explanation:

• Parasitic: Parasites harm the host. Mitochondria provide energy (benefit) to human cells, so not parasitic.
• Mutualistic: In mutualism, both organisms benefit. Mitochondria get a protected environment (from human cell) and nutrients. Human cells get energy (ATP) produced by mitochondria.
• Competitive: Competition involves fighting for resources. Mitochondria and human cells do not compete; they have a cooperative-like (if separate) relationship.
• Pathogenic: Pathogens cause disease. Mitochondria are essential for cell function (energy production) and do not cause disease in this context.

Answer:

mutualistic