Context: Endosymbiosis is any symbiotic relationship in which one symbiont lives within the tissues of the other, either within the cells or extracellularly. Examples include diverse microbiomes, rhizobia, nitrogen-fixing bacteria that live in root nodules on legume roots; actinomycete nitrogen-fixing bacteria called Frankia, which live in alder tree root nodules; single-celled algae inside reef-building corals; and bacterial endosymbionts that provide essential nutrients to about 10%–15% of insects.

Question: What do bacterial endosymbionts give necessary nutrition to?
Answer: insects

Question: What is the name of a bacteria inside of tree roots?
Answer: Frankia

Question: What endosymbionts live in coral? 
Answer: algae

Question: What percent of alder tree root nodules provide essential nutrients to insects?
Answer: Unanswerable

Question: What organism includes diverse microbiomes, rhizobia, nitrogen-fixing bacteria, and single-celled algae?
Answer: Unanswerable

Question: What percent of Frankia bacteria provide essential nutrients to insects?
Answer: Unanswerable

Question: What are the bacterial endosymbionts that provide essential nutrients to about 10%–15% of insects called?
Answer: Unanswerable

Question: What percent of rhizobia and nitrogen-fixing bacteria live in alder tree root nodules?
Answer: Unanswerable