Cigarette smoking ________
A) is responsible for about one in five deaths of Americans every year
B) accounts for 80—90% of all cases of lung cancer
C) can affect the health of nonsmokers through secondhand smoke
D) all of the above
D
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True or False:All human impact on the environment is negative
A. true B. false
Recombination between homologous chromosomes:
A. can lead to a gene conversion event if the region between the two Holliday intermediates contains base pair differences. B. uses extended synthesis-dependent strand annealing (ESDSA) rather than synthesis-dependent strand annealing (SDSA). C. can occur at completely random sites on the chromosome; there is no apparent regulation of the process. D. occurs between sister chromatids and nonsister chromatids with equal frequency. E. None of the choices given is true.
Endochondral ossification step 4
What will be an ideal response?
Current classification of the algae is based on morphologic characteristics
Indicate whether the statement is true or false