1 is four
2 is protozoan
3 is museums
4 is fungi
5 is only one kingdom
6 is protozoan 7 is 2
I can’t answer how lichens arrive in a barren landscape but I can answer the 2nd part
Lichens grow when exposed to water. When wet, lichens begin to photosynthesize.
The frogs can get hurt by jumping to the feet
The calvin cycle, i believe
Hope it helps!