Month: September 2016

Lichens can be used as environmental indicator because lichens produce sulfur dioxide and this gets released in the air. When sulfur dioxide and rain mix they make acid rain so with lichens they will make more acid rain. Also, sulfur dioxide is toxic/poisonous so if there is a high level of sulfur then the air will be poisonous and everyone will die.

Natural selection is when a species of animal moves to a different habitat. When they move to this unknown habit and they don’t have the right characteristics to survive the new habitat or it take a lot of time to gain resources. After, a while a mutation happens in the DNA and sometimes the mutation helps with the new environment but sometimes they can be bad. when the adapted offsprings grow up they have better characteristics to collect the resources faster and better resources than the other animals in his species so after a while the others die off and the adapted animal breeds and creates another evolution of their species then that is natural selection happening.