What is a person called who study's living things?

What are some similarities between Carbon Silicon Tin Lead and germanium? Is an atom of an element with a different number of neutrons called ion or isotope? When did Neocron happen? Which layer of earth provide us mineral and metal? What river flows from the himalayas through india and bangladesh? Which is better- 42 in ceiling fan or 52 in ceiling fan? What is a good conclusion for a report on Jupiter? How many countries showen lie at least partially above 60 n latitude? How big is the spotter zone air transportation? What is an ichthylogist's annual salary? Is rainwater only one substance? What is a critical universe? How do you make slime with just water glue and flour or can you? Is there an island named Icarus? Who are the most famous basketballers? What experiments made Isaac newton famous? What Happens When You Remove A Catalyst? What is a definition for the word 'nuclear'? How is the tropical rainforest being threatened by global warming? How do you prepare before a mudslide?