Monocercomonoides are a genus of single-celled organisms that live as parasites in the guts of small animals. They lack mitochondria, but other evidence shows them to be most closely related to members of the excavates. Looking at the tree for eukaryotes, what can you conclude about the Monocercomonoides

Lack of mitochondria.

Explanation:

Monocercomonoides is the first eukaryotic organism discovered in which there is no trace of mitochondria in its body. Monocercomonoides do not need mitochondria because the organism uses enzymes that are present in its cytoplasm which break down food and generate energy from it which are used by its body in different activities. In other eukaryotes, mitochondria is also absent in their body but there is nuclear DNA that contains some of the genes that required to assemble mitochondria, but there is no such genes are present in Monocercomonoides.

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