Choose the Most Appropriate Statement That Matches Each Term

Choose the most appropriate statement that matches each term.

-Gemmata obscuriglobus

A) a substance that occurs only or predominantly in cells of a specific type.
B) simple transitional forms between early organic compounds and the first living cells
C) a bacterial species thought to be a close relative of the bacteria ancestral to mitochondria
D) first organisms with the noncyclic pathway of photosynthesis
E) bacteria able to withstand high levels of mutation-causing radiation
F) offered support for endosymbiosis
G) dome-shaped fossil remains of photoautotrophic bacteria (some nonfossil structures also form) .
H) RNAs that function as enzymes
I) earliest known organism that can be assigned to a modern group