When it came to explaining the origins of variation within species, Darwin
a. used Mendel's theory of heredity
b. agreed with Lamarck that it was caused by an animal's inner needs
c. argued it was caused by differential use of an animal's body parts
d. had no idea of the true causes
e. used his research gathered while at Cambridge
d
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In recent years, tamarin monkey populations in Brazil have begun to stabilize, showing that conservation efforts are helping these primates
a. True b. False Indicate whether the statement is true or false
Which of the following statements is FALSE about the new communications technology of the 21st century? a. There are space limitations that will ultimately restrain the development of new technologies. b. New technology has exploded in the last several decades. c. Networking websites such as Facebook, cell phones, and blogs are changing many aspects of the socialstructure
d. Cell phones are now used for sending "disinformation.". e. Cell phones are used to avoid social contact in some areas.
Which of the following distinguish(s) the Neandertals from Homo sapiens?
A) Neandertals had greater height and weight. B) Neandertals had a retromolar gap behind the lower third molar. C) Neandertals had a more prominant chin than modern humans D) Neandertals had a brain size less of than 1400 cc. E) Neandertals had a complete lack of facial prognathism
The ________ competitive fringe firms in the market, the ________ the markup and the ________ the profit for the dominant firm.
A) less; lower; higher B) more; higher; lower C) more; lower; lower D) less; higher; lower