Scientists Continue to Debate the Relationship Between Two Homo Fossil

question 50

Multiple Choice

Scientists continue to debate the relationship between two Homo fossil finds: KNM-ER 1470, named H. rudolfensis by some, and KNM-ER 1813, generally considered to be an exemplar of H. habilis. Is the smaller KNM-ER 1813 a distinct species? Could it be a female version of KNM-ER 1470, both being simply a female and male pair of the highly variable H. habilis? The only sure conclusion is that

• A) there is a trend in hominin evolution toward large molars.
• B) females are poorly represented in the hominin fossil record.
• C) no hominin fossil younger than 2.5 m.y.a. has exhibited chimplike features.
• D) KNM-ER 1470 is more like an australopith than a Homo.
• E) several different kinds of hominin lived in Africa before and after the advent of Homo.

---

Definitions:

Pineal Gland

A small endocrine gland in the brain responsible for producing melatonin, a hormone that regulates sleep-wake cycles.

Environmental Changes

Modifications to the surroundings or habitat, often caused by human activities or natural phenomena, which can impact ecosystems and living conditions.

Recorded Messages

Pre-made audio or video content that has been captured and stored for later replay or distribution.

Dream Content

The themes, narratives, images, and emotions that make up a dream, often subject to interpretation in terms of underlying psychology.