People who have type O blood are considered ________ because they ________
A) universal recipients : have no antibodies to A or B
B) universal recipients : have no A or B antigens
C) universalists : cannot receive blood transfusions
D) universal donors : have no A or B antigens
E) universal donors : have no antibodies to A or B
Ans: D) universal donors : have no A or B antigens
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a. passive transport. b. sunlight. c. root pressure. d. upward pressure as sugar is forced into the roots. e. pumping by the xylem cells.
The pea plant was an excellent choice for
Mendel's experiments because a. true-breeding varieties were available. b. the plant can self-fertilize. c. it can be cross-fertilized. d. true-breeding varieties were available, and it can be cross-fertilized. e. true-breeding varieties were available, the plant can self-fertilize, and it can be crossfertilized.
Gene therapy can be used to treat
a) cystic fibrosis b) Zika virus infections. c) antibiotic-resistant S. aureus infections. d) avian influenza A infections.
A community of organisms interacting with their physical environment is a(n)
A. population. B. ecosystem. C. biosphere. D. organism. E. macromolecular community.