Which of the following is NOT a characteristic of mammals? fur viviparous nails
ID: 168058 • Letter: W
Question
Which of the following is NOT a characteristic of mammals? fur viviparous nails instead of claws has mammary glands Which of the following is not a characteristic of primates? grasping hands homodont dentition nails instead of claws forward-facing eyes The Laetoli footprints in Tanzania were likely made by Australopithecus afarensis. Explain why finding the Laetoli footprints was so important in understanding human evolution. The footprint is smaller than a modern human's. The rock it imprinted on was from a volcano. There were footprints from at least two individuals. The big toe was in line with the rest of the foot, proving that some early human ancestors were bipeds, or walked. Neanderthals have short, stocky bodies and smaller limbs in comparison with humans. Why do researchers think that Neanderthals had this body type? Having short, stocky bodies and smaller limbs is an adaptation to keep them warm in the cold. Neanderthals have a single gene that makes them short. They are short so that they could hide easily from predators. Neanderthals actually aren't short and stocky compared to humans-this is a trick question! Homo erectus is interesting in that although it evolved in Africa... It never left Africa, like all other hominins before them. It attempted to cross Africa into Eurasia, although it was unsuccessful. It migrated to Europe and Asia, being the first hominin to do so. It migrated to the Americans, but not into Europe or Asia.Explanation / Answer
Answer:
29. (c) Nails instead of claws
Mammals are characterized by the presence of hair, mammary gland and exhibit viviparity. Carnivores contain claws while primate have nails instead of claws.
30. (b) Homodont dentition
Primates have heterodont dentition, i.e, they have specialized teetch for specialized functions. example: Incisors, Canines, Premolars and Molars.
31. (d) The big toe was in line with the rest of the foot, proving that some early human ancestors were bipedal and walked.
The Laetoli Footprints received significant recognition by the public, providing convincing evidence of bipedalism in Pliocene hominids based on analysis of the impressions. The footprints and skeletal structure excavated at Laetoli showed clear evidence that bipedalism preceded enlarged brains in hominids. Although Highly debated, it is believed these footprints were created by Australopithecus Afarensis.
32. (a) Having short, stocky bodies and smaller limbs is an adaptation to keep them warm in the cold.
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