Choose one of the pairs of hominids below and compare them, including their morphology, social development, tool
making, etc.
A. Homo habilis and Homo neanderthalensis
B. Homo neanderthalensis and Homo sapiens
C. Ardipithecus ramidus and Australopithecus anamensis
D. Australopithecus afarensis and Australopithecus africanus What will be an ideal response?
A. Homo habilis is the first hominin. This fossil species of Homo had a small brain and
smaller premolars and was found with primitive tools. Homo neanderthalensis was a more
recent species of Homo, and it is believed that modern humans lived around the same time.
Their brains and front teeth were larger than modern humans. Their tools were more
sophisticated than those made by Homo habilis.
B. Homo neanderthalensis lived 250,000-28,000 years ago. They had a short sturdy build
with receding chins and foreheads. Their brains, however, were larger than those of Homo
sapiens. Homo sapiens existed in Africa 195,000 years ago.
C. Ardipithecus ramidus is close to the root of the human family tree. The shape of the toe
bones suggest that Ardipithecus walked upright. Ardipithecus ramidus gave rise to
Australopithecus anamensis. This species has a mix of ape-like and human features.
Australopithecus anamensis had sexual dimorphism. The tibia of this species suggest that
they walked upright.
D. Australopithecus afarensis gave rise to Australopithecus africanus. A. afarensis. had small
brains. No evidence of tools was found with A. afarensis. A. africanus possessed humanlike
hands and teeth
You might also like to view...
Mitotic recombination occurs between homologous chromosomes. In which of the following would you not expect to encounter mitotic recombination?
A. The fungus, Aspergillus nidulans B. Tobacco plants C. Homo sapiens D. Drosophila melanogaster
The spread of an action potential through heart tissue is made possible by
A. gap junctions. B. tight junctions. C. a network of neurons in the heart. D. myogenic junctions. E. synaptic clefts.
In prokaryotes, the genes for metabolic pathways are ____
a. always expressed for early steps in the pathway, but generally not expressed for later steps in the pathway b. always expressed so the bacteria can respond to rapidly to changing conditions c. turned on and off as conditions change d. always independently regulated e. generally expressed at low levels, but expressed at high levels when conditions warrant
Which of the following is NOT a somatic cell?
a. liver b. skin c. bone d. blood e. sperm