2.11

which of the following is a characteristic of mitochondria and chloroplasts that supports the endosymbiotic theory?

both contain DNA molecules.

evolved from a photoautotrophic prokaryote

chloroplast

mitochondria are found in most eukaryotic cells and contain their own DNA and ribosomes that are similar to those typical of many prokaryotic cells. which of the following statements is justified by these observations?

an ancestral cell most likely engulfed anaerobic prokaryote in a relationship that proved beneficial for both cells

which of the following groups of cellular components are found in eukaryotic cells but not prokaryotic cells?

an endoplasmic reticulum, mitochondria, and a nucleus

which of the following best supports the statement that mitochondria are descendants of endosymbiotic bacteria-like cells?

mitochondria and bacteria possess similar ribosomes and DNA

which of the following provides the weakest evidence that mitochondria were once free-living prokaryotes?

mitochondria and prokaryotes both are found in a variety of sizes

the endosymbiont theory proposes a model for the evolution of mitochondria. according to the model, an ancestral eukaryote engulfed a small, free-living prokaryotic organism. the engulfed prokaryote then formed an endosymbiotic relationship with the eukaryotic host. which of the following observations best supports the model?

mitochondria and some prokaryotes share similar metabolic reactions that produce ATP

which of the following is the strongest evidence supporting the endosymbiont hypothesis?

mitochondria have their own DNA and divide independently of the cell

which of the following statements best supports the claim that certain organelles within eukaryotic cells evolved from free-living prokaryotic cells?

some organelles contain their own DNA that is more similar to prokaryotic DNA in structure and function than to the eukaryotic DNA found in the cell's nucleus

researchers claimed that a particular organelle originated from a free-living prokaryotic cell that was engulfed by a larger cell, as shown in Figure 1. which of the following provides evidence to best support the researchers' claim?

the organelle has a double membrane

the diagram above represents a typical rod-shaped bacterium. which of the following best describes a feature shown in the diagram that is unique to archaea and bacteria?

the organism does not have a nuclear membrane surrounding its genetic material