Which of the following is a pair of symbiotic organisms
*
Both a and b
b. Rhizobium and a legume
a. Lichens
None of these​

There are many types of animals without back bones. what type of information will follow? a) a list of animals without backbones. b) the scientific name for animals without backbones. c) descriptions of animals with backbones. d) an explanation of where animals without backbones live.