When homologous chromosomes exchange genes, it is called: [crossing over/ independent assortment].

this website is for anybody really not just for girls just saying, also while a lot of males are mean and you know there are the few who are kind and then there's the nice-guys but then theirs also guys like me who are shy we don't get out much because there are people like you who exist who would most likely punch a guy in the face so next time just think about things before you post them to a website where guys and girls can see your question.

lichens that colonize bare rock secrete acids that break down the rock and start the soil-production process. so they expose rocks

i believe this is true, if you're asking for whether its true or false. : )