You leave for winter vacation and forget to water your plants for two whole weeks! You also turned down the heat and closed the blinds. What hormone is most likely to be produced in response to these conditions?
A. cytokinins
B. auxins
C. abscisic acid
D. gibberellins
Answer: C
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Viruses are the cause of various diseases such as polio, HIV, or the flu. However, viruses are also very helpful to our environment. In what way can viruses be beneficial to the environment?
A. Viruses caused the evolution of singlecelled eukaryotes through horizontal gene transfer, thereby limiting the number of these microorganisms in soil and water. B. Viruses limit the bacterial infections in animals by causing mutations within the bacterial genome. C. Viruses limit the number of viral infections in animals by mutating other viruses on contact. D. Viruses limit the number of bacterial infections in plants by causing the mutations within the plant genome. E. Viruses aided evolution of bacterial and archaeal genomes and limit the number of other viruses and other microoganisms in soil and water.
The most common marine annelids are:
a. polychaetes. b. roundworms. c. earthworms. d. leeches. e. ribbon worms.
White blood cells and ____ carry out innate immune responses
a. red blood cells b. T cells c. B cells d. skin e. defensive proteins
Which of the following is NOT caused by bacteria?
a. morning breath b. pneumonia c. malaria d. tuberculosis e. the taste of sourdough bread