What are the distinguishing features of the hominin lineage?
a. bipedalism and dentition c. big brains and dentition
b. bipedalism and big brains d. big brains only
A
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How many experiments have been conducted worldwide to test Darwin's initial hypothesis regarding natural selection?
A. one B. 50 C. 100 D. 500 E. thousands
If you wanted to kill the plants in a lake using a chemical which stops photosynthesis, to which zone should you apply the chemical?
A. littoral B. profundal C. pelagic D. benthic E. limnetic
Which of the following is not an impact of acid
rain? a. It stops fish egg development b. It can burn foliage. c. It releases toxins in the soil. d. It causes eutrophication e. It can kill adult aquatic organisms
Which layer of the digestive tract contains blood and lymph vessels?
a. mucosa b. circular muscle c. longitudinal muscle d. submucosa e. serosa