What do you know about polar bonds? How does it relate to the question?
What will be an ideal response?
The greater the difference in electronegativity between two atoms in a covalent bond the more polar
the bond will be.
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Pesticide use has grown a great deal in the past century, and similar to the plant-herbivore evolutionary "arms race":
A. increased use of pesticides is leading to increased rates of resistance. B. widespread chemical treatments pose little concern because they wipe out all existing herbivores. C. pesticides are killing pests and their predators, reducing the overall level of herbivory in crop plants.
Normal genes that code for proteins that act in cell division are ____________________. Fill in the blank(s) with the appropriate word(s)
Which of these mechanisms is a postzygotic barrier to reproduction?
a. interbreeding b. hybrid sterility c. habitat isolation d. behavioral isolation
e. mechanical isolation
During the inflammatory response, dilation of blood vessels is caused by
A. both histamine and nitric oxide. B. cytokines. C. histamine. D. phagocytes. E. nitric oxide.