Exam (elaborations)
The Human Family' Earliest Ancestors
- Course
- Institution
The Human Family' Earliest Ancestors
[Show more]
Seller
Follow
lydiaomutho
Content preview
The Human Family' Earliest AncestorsWhen did Ardi live? - correct answer-4.4 million years ago.
What is Ardi short for? - correct answer-Ardipithecus ramidus
Why is the discovery of Ardi significant? - correct answer-Ardi represents an early stage of
human evolution when an ancient ape body plan was being remodeled to live in two worlds-
in the trees and on the ground, where hominids increasingly foraged for plants, eggs, and
small critters.The Ardi research also challenged the long held views that hominids evolved in
a grassy savanna.
What do her physical characteristics tell us about her species mode of locomotion, and how
they lived? - correct answer-Ardi walked upright as evidenced by a cast of her upper pelvic
blades, which are shorter and broader than an ape's. Ardi didn't walk like us though. Ardi's
lower pelvis, like chimps, had powerful hip and thigh muscles that would have made it
difficult to run as fast or as far as modern humans. And she had an opposable big toe, which
suggests she still spent a lot of time in trees.
When did Homo erectus arise? - correct answer-1.8 million years ago.
What genus and species is Lucy? When did she live? What are her physical characteristics?
What do her physical characteristics tell us about her? - correct answer-At 3.2 million years
old, Lucy was remarkably primitive, with a brain and body about the size of a chimp's. But
her ankle, knee, and pelvis showed that she walked upright like us. This meant Lucy was a
hominid- only humans and our close relatives in the human family habitually walk upright on
the ground. A member of the species, Australopithecus afarensis, which lived from 3.9
million to 2.9 million years ago, Lucy helped answer some key questions. She confirmed that
upright walking evolved long before hominoids began using tools- about 2.6 million years
ago- and before their brains began to expand dramatically. She was 4 ft 100 and 110
pounds.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller lydiaomutho. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77333 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now