Anthropologist Ruben Andersson's study of migrants concludes that
A. migration needs to be normalized and "unfenced."
B. high-tech border control systems, including razor-wire fences, are necessary to keep migrants away.
C. the current system of deterrence in the EU is effective in stopping illegal migrants.
D. all borders should be eliminated.
E. more law enforcement is needed at border crossings.
Answer: A
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The X and Y chromosomes are called
a. autosomes. b. gametes. c. centromeres. d. sex chromosomes. e. karyotypes.
Which of the following statements best describes the evolutionary model presented by C. Darwin in On the Origin of Species?
A) organisms generally practice reproductive restraint. This allows all members of a species to be uniform in their traits. Changes in species (evolution) may be attributed to periodic divine intervention. B) the members of any species vary among themselves and may be viewed as in competition with one another. Individuals possessing adaptive traits (one that aid in this competition) will survive and reproduce. Over time, the adaptive traits will spread within the species. C) two or more physical types exist within species, one of which will ultimately prove to be fittest. D) organisms generally produce fewer offspring then the environment can support. Evolution then acts to increase the reproductive success of all members of a species equally. E) within every population there is competition. Those animals that refrain from competing will have greater rates of survival and reproduction than more aggressive individuals.
What influences a Paraguayan to decide to use Spanish or Guarani in an interaction?
A where the interaction occurs B how formal the interaction is C how intimate the interlocutors are D how serious the conversation is E all of the above
Random segregation of chromosomes in meiosis is a cause of genetic variation
Indicate whether the statement is true or false