PrepTest 55, Section 2, Question 5
Many scientists believe that bipedal locomotion (walking on two feet) evolved in early hominids in response to the move from life in dense forests to life in open grasslands. Bipedalism would have allowed early hominids to see over tall grasses, helping them to locate food and to detect and avoid predators. However, because bipedalism also would have conferred substantial advantages upon early hominids who never left the forest�in gathering food found within standing reach of the forest floor, for example�debate continues concerning its origins. It may even have evolved, like the upright threat displays of many large apes, because it bettered an individual's odds of finding a mate.
Many scientists believe that bipedal locomotion (walking on two feet) evolved in early hominids in response to the move from life in dense forests to life in open grasslands. Bipedalism would have allowed early hominids to see over tall grasses, helping them to locate food and to detect and avoid predators. However, because bipedalism also would have conferred substantial advantages upon early hominids who never left the forest�in gathering food found within standing reach of the forest floor, for example�debate continues concerning its origins. It may even have evolved, like the upright threat displays of many large apes, because it bettered an individual's odds of finding a mate.
Many scientists believe that bipedal locomotion (walking on two feet) evolved in early hominids in response to the move from life in dense forests to life in open grasslands. Bipedalism would have allowed early hominids to see over tall grasses, helping them to locate food and to detect and avoid predators. However, because bipedalism also would have conferred substantial advantages upon early hominids who never left the forest�in gathering food found within standing reach of the forest floor, for example�debate continues concerning its origins. It may even have evolved, like the upright threat displays of many large apes, because it bettered an individual's odds of finding a mate.
Many scientists believe that bipedal locomotion (walking on two feet) evolved in early hominids in response to the move from life in dense forests to life in open grasslands. Bipedalism would have allowed early hominids to see over tall grasses, helping them to locate food and to detect and avoid predators. However, because bipedalism also would have conferred substantial advantages upon early hominids who never left the forest�in gathering food found within standing reach of the forest floor, for example�debate continues concerning its origins. It may even have evolved, like the upright threat displays of many large apes, because it bettered an individual's odds of finding a mate.
Which one of the following statements is most supported by the information above?
For early hominids, forest environments were generally more hospitable than grassland environments.
Bipedal locomotion would have helped early hominids gather food.
Bipedal locomotion actually would not be advantageous to hominids living in open grassland environments.
Bipedal locomotion probably evolved among early hominids who exclusively inhabited forest environments.
For early hominids, gathering food was more relevant to survival than was detecting and avoiding predators.
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