Phototropins are light-activated kinases. Indicate whether the statement is true or false
True
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Why did the H1N1 strain of influenza virus cause a pandemic in 2009?
A) The H1N1 virus had a mutation that increased the mortality associated with infection. B) The H1N1 virus had a mutation that increased the basic reproduction number of the virus. C) The H1N1 virus underwent a significant antigenic shift compared to other circulating strains of influenza. D) The H1N1 virus acquired a new gene from pigs that resulted in increased virulence.
Polydactyly is considered a Mendelian trait because
A) it is caused by linked genes. B) it is caused by a single gene. C) it is caused due to environmental factors. D) it affects the stem cells.
Which of the following nutrients is most closely linked to the energy cycle in ecosystems?
A) carbon B) nitrogen C) lead D) sulfur
Homologous chromosomes are similar in all of these characteristics EXCEPT:
A. similar in size. B. carry the same alleles for all traits. C. carry genes for the same traits. D. similar in shape and location of the centromere