Which type of bond represents a weak chemical bond?
a) nonpolar covalent bond
b) polar covalent bond
c) hydrogen bond
d) ionic bond
Ans: c) hydrogen bond
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Male zebra finches behave differently toward familiar neighbors, whom they largely ignore, and unfamiliar singers,
whom they attack and drive away. This behavior is a result of ____.
a. operant conditioning b. classical conditioning c. cognition d. imprinting e. habituation
An example of a freshwater wetland is a(n) estuary. Indicate whether the statement is true or false
As an experiment, you infect bacteria with an unknown virus to see how the bacteriophage affects the bacteria. After a few days, you notice that the bacterial population is growing normally and that the cells appear healthy
Assuming that the infection occurred, what can you conclude from your observations? A) The virus is a bacteriophage that is reproducing the lytic cycle. B) The virus is a retrovirus that is reproducing the lytic cycle. C) The virus is a bacteriophage that is reproducing the lysogenic cycle. D) The virus is a retrovirus that is reproducing the lysogenic cycle.
A trend first observed in the evolution of the earliest tetrapods was _____
A) the appearance of jaws B) feet with digits C) the mineralization of the endoskeleton D) the amniotic egg