In the out-of-Africa hypothesis, there was interbreeding between the ancestors of modern humans on three continents.
Answer the following statement true (T) or false (F)
False
The out-of-Africa hypothesis proposes that modern humans evolved from archaic humans only in Africa, and then migrated to Asia and Europe.
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Which of the following is a possible application of DNA microarrays?
A. cell-specific gene expression B. gene regulation C. elucidation of metabolic pathways D. tumor profiling E. All of the choices are correct.
Where in the cell would the centromere be found?
a. position where metaphase chromosomes align b. location where the mitotic spindle forms c. central region of a chromosome where the spindle microtubules attach d. location where chromosomes cluster during telophase e. center of the cell where the nucleus is found during prophase
Suppose that you have a cell with a membrane that is permeable to water but not to Na+ or Cl? or any
other solute. There is more NaCl outside the cell than inside the cell, and the osmolarity of the cell is higher than that of the solution surrounding the cell. Which of the following should occur?
a. Overall, the cell should lose water. b. Overall, the cell should take up water, Na+, and Cl?. c. Overall, the cell should take up water. d. Overall, the cell should take up water and lose Na+ and Cl?. e. Overall, the cell should lose water and take up Na+ and Cl?.
It is known that many trees lose their leaves in response to decreasing day length. As a result, you think that Ginkgo trees may also lose their leaves in response to decreasing day length. This statement is an example of:
A. an experiment B. a hypothesis C. a theory D. deductive reasoning