When only one copy of a human beta globin gene codes for valine instead of glutamic acid in position 6, then that person is ________
a. capable of making both normal and abnormal hemoglobin
b. completely normal
c. affected with sickle cell anemia
d. none of the choices
a
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Which pattern of diploid and haploid phases reflect the life cycle in plants?
a. alternation between haploid and diploid generations b. two haploid generations followed by a diploid generation c. one haploid generation followed by two diploid generations d. a single generation that limits the haploid state to gametes while the rest of the organism is diploid e. a single generation that limits the diploid state to gametes while the rest of the organism is haploid
Due to the infections of ________ by Claviceps purpurea human history has been altered
a. milk b. meat c. wine d. rye e. tomatoes
Plants that are adapted to growing in flooded soils that are depleted of oxygen have:a
aerial roots. b. contractile roots. c. pneumatophores. d. prop roots. e. buttress roots
Describe the cancer stem cell hypothesis. How might this explain the inability of traditional cancer treatments such as radiation and chemotherapy to completely eradicate tumors?
What will be an ideal response?