The excavates are a clade of eukaryotes that includes groups without mitochondri

Question

The excavates are a clade of eukaryotes that includes groups without mitochondria. which of the following is the most convincing evidence that this absence of mitochondria is a derived condition resulting from a secondary loss?
select one
a) there is a nuclear membrane in these organisms
b) the cell membrane of these organisms is flexible and capable of phagocytosis
c) some of the nuclear genes of these organisms are normally associated with mitochondria
d) in euglenids, a group in this Clade   with mitochondria, the mitochondria have distinctive disc-shaped cristae.
e) other eukaryote clades have both chloroplasts and mitochondria.

Explanation / Answer

c) Association of nuclear gene with mitochondria is most supportive evidence because Association of nuclear gene is long evolutionary process and sudden loss of mitochondria unable to loss of nuclear gene.

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