While Alfred Russel Wallace is famous for co-publishing the theory of evolution by natural selection with Charles Darwin in 1858, he also gathered extensive evidence independently. Which of the following areas of evolutionary biology is Wallace best known for pioneering?
The inheritance of acquired characteristics during an organism's lifetime and the concept of use-and-disuse.
The basic principles of particulate inheritance and allele segregation using hybridization experiments.
Warning coloration in animals as an evolutionary adaptation and theories on the mechanism of speciation.
The binomial system of classification and the division of life into three distinct cellular domains.