If a Punnett square is used to visualize a three-factor cross (trihybrid cross) how many boxes would be inside of the square?
A. 3
B. 8
C. 48
D. 64
E. Can't be determined
D
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Which lymph structure is central to the body's immunity?
a. Thoracic duct b. Bone marrow c. Thymus d. Spleen e. Lymph node
There is a population of giraffes. Some have short necks, some have medium-length necks, and some have long necks. If the short-necked individuals are regularly eliminated from the population, this would be an example of
A. disruptive selection. B. sexual selection. C. disfunctional selection. D. directional selection.
Which of the following statements regarding an inactivated vaccine is FALSE?
A) It can be produced with deactivated whole microorganisms. B) It can be produced from antigenic fragments of a pathogen. C) It is safer than an attenuated vaccine. D) It is made from mutated forms of the pathogen. E) It is made from pathogens that cannot replicate.
Deficiency of which nutrient can cause muscle cramps, irregular heartbeat, or paralysis?
A) iron B) sulfur C) copper D) potassium