a biologist
a person that studies gems is called a gemologist.
The Person Who studies about mamals , he is called mamalogist....
A person who studies animals is called a zoologist.
A person who studies physics is called a physicist, a person who studies chemistry is called a chemist, and a person who studies biology is called a biologist.
A person who studies or writes history is called a historian.
A person who studies the mind and behavior is called a psychologist.
A person who studies culture is called an anthropologist.
A person who studies bees is called an apiologist.
A person who studies philosophy is called a philosopher.
A person who studies sound is called an acoustician.
A person who studies flowers and plants is called a botanist.
A person who studies mold is called a mycologist.