What results from an unequal sharing of electrons between atoms?
A) a nonpolar covalent bond
B) a polar covalent bond
C) an ionic bond
D) a hydrophobic interaction
B
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Regarding infection, what is the problem with
cystic fibrosis?
a. bacteria are not captured properly to signal an immune response b. white blood cells are mutated and do not recognize foreign bacteria c. the mutated cystic fibrosis protein is not recognized by the immune system d. because multiple copies of the mutated protein are made, the immune system goes into hyperdrive e. more than one of these problems occurs
What factors are found in both tropical and temperate forests?
A) rainy and dry seasons B) seasonal changes in temperature C) enough precipitation to support large trees D) the same species of trees
Which of the following statements about B cells is true?
A. Some B cells become memory cells. B. B cells change into plasma cells after encountering an antigen and then produce antibodies. C. B cells develop and mature in the bone marrow. D. B cells carry receptor molecules on their cell surfaces. E. All of these are true.
With incomplete dominance, a likely ratio resulting from a monohybrid cross would be ________
A) 3:3 B) 9:3:3:1 C) 3:1 D) 1:2:1 E) 1:2:2:4