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

What is cotransport and why is it an advantage to living organisms? What Name the three basic parts to a toolbox? What is the range of half-lives of different radioactive element? What is the trend in the boiling points of the halogens? What happens if kleptomania goes untreated? How many children did the Roman god Mars have? Atoms that share electrons have..bonds? What terms tells how far north or south of the Equator a place lies? Who made up mermaids? What planet does sonic live on? What are the 5 levels of multicellular organization? What forms a conglomerate? Define different type of corrosion and explain electrochemical theory of corrosion.how will you protect corrosion? Why does water change the appearance of a penny? How can you break a knuckle? What is used for fertilizer an acid or a base? What is 3 percent of 50 pounds as expressed in pounds and ounces? Equivalent measurement of 155 cm in feet? What happens when atoms gain loose or share electrons? What type of rock are made from plains and lowlands?