Homo erectus was a very successful species. Describe the traits of this human ancestor.
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Homo erectus was a social species and lived in groups of 20 to 50 individuals. The groups lived in caves and hunted large animals. They butchered and cooked their food. Homo erectus was more widespread, more numerous, and more successful than H. habilis. It is highly probable that H. erectus could talk. Larger than H. habilis, H. erectus had a large brain and a rounded jaw, like modern humans. H. erectus survived for more than one million years, which is longer than any other human species.
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Which of the following are adaptations of fluid feeders that feed on the blood of other
animals?
a. piercing and sucking mouthparts b. production of anesthetic compounds c. production of anticoagulants d. all of these
A sharp cline may indicate
A) a sudden increase in the mutation rate. B) a population bottleneck. C) a geographical obstacle, such as a mountain. D) nonrandom mating.
Annelids are segmented worms
____________________ Indicate whether the statement is true or false.
During photosynthesis, solar energy is converted to
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