What is the significance of Kenyanthropus, a 3.5-million-year-old fossil that Maeve Leakey discovered in Kenya in 1999?
A. It puts an end to the debate between taxonomic splitters and lumpers.
B. It confirms that the development of big brains preceded the onset of bipedalism.
C. It replaces Lucy (3.2 m.y.a.) as the earliest known hominin skeleton.
D. It is the ancestor of Homo but not australopithecines.
E. It suggests the possibility that at least two hominin lineages existed as far back as 3.5 million years ago.
Question 2
All of the following about Ardipithecus kadabba are true EXCEPT that
A. it is recognized as the earliest known hominin, with the Toumai find from Chad, dated to 76 m.y.a., and Orrorin tugenensis from Kenya, dated to 6 m.y.a., as possibly even older hominins.
B. the kadabba find consists of 11 specimens, including a jaw bone with teeth, hand and foot bones, fragments of arm bones, and a piece of collarbone.
C. its bipedalism is still questioned because none of the fossil bones found was a pelvis or a femur.
D. it lived during the late Miocene, between 5.8 and 5.5 million years ago.
E. its fossils belong to individuals that were apelike in size, anatomy, and habitat.
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