How does the symbiotic relationship between the fungi and algae (or cyanobacteria) in lichen make it an ideal pioneer species when no soil remains in an ecosystem?

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it

the alkaline earth metals (beryllium (be), magnesium (mg), calcium (ca), strontium (sr), barium (ba), and radium (ra)) are a group of chemical elements in the s-block of the periodic table with very similar properties: shiny. silvery-white. hopefully this ? i didn't fully understand the question