Answer:
Who believed that organisms inherited acquired characteristics?
Lamarckism (or Lamarckian inheritance) is the hypothesis that an organism can pass on characteristics that it has acquired through use or disuse during its lifetime to its offspring. It is also known as the inheritance of acquired characteristics or soft inheritance.
Who grouped humans with primates in the same genus? I'm sorry, but I don't know this one...
Who thought that, if left unchecked, a population would outgrow its food source? Thomas Robert Malthus
Known for his work on population growth, Thomas Robert Malthus argued that if left unchecked, a population will outgrow its resources, leading to a host of problems