How are lichens able to survive in places that most organisms are unable to live, such as on mountaintops and in a barren desert

This is because lichen is a symbiotic relationship between fungi and algae that makes them versatile. The fungi hyphae are able to produce enzymes extracellularly that dissolve the substrate and absorb the nutrient. These shallow roots are therefore able to grow on bare rocks and provide an anchor. The algae, on the other hand, are able to photosynthesize and provide carbohydrates to the fungi while the fungi protect the algae.  

This is because lichen is a symbiotic relationship between fungi and algae that makes them versatile. The fungi hyphae can produce enzymes extracellularly that dissolve the substrate and absorb the nutrient. These shallow roots can therefore grow on bare rocks and provide an anchor. The algae can photosynthesize and provide carbohydrates to the fungi while the fungi protect the algae.  

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles

not sure if this is what you'r looking for eubacteria and archaebacteria