Two groups of Homo erectus live in India. These Homo erectus interbreed in their natural habitat producing fertile and viable offspring. With thousands and thousands of years, these Homo erectus developed long, external spines in order to protect them from other animals that preyed on them. This is an example of gradualism- species change slowly and gradually.
Within this group of Homo erectus, there are two populations. A population is a group within a certain species. The allele for a protective, external spine is domin
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