What physical features of the first hominins are more like the chimpanzee lineage than the hominin lineage

Which animal group is the largest and contains more species from all the other living groups combined? is it mammals or

Creation of an unnaturally uniform sample to represent a diverse populationcan be avoided by: a. including only willing b. asking another scientist for .c. choosing only identical participants. d. selecting individuals at random.

This is so important ugh its 25 points