Shivering is used by mammals to increase body heat when the hypothalamus detects a body temperature below the set point. Although the behavior involves muscles, the outcome is not movement but "wasted" energy in the form of heat. This is an example of nature reusing a body structure for an additional purpose.A scout troop sets out on a backpacking trip. Soon, an unexpected storm gets them drenched, and the troop leaders discover that few boys have packed warm clothes. Several scouts start shivering uncontrollably, a sign of hypothermia. The leaders call off the trip and the group heads back to their cars. This shivering response was
A. an attempt to produce heat by burning large amounts of ATP.
B. an attempt to produce heat by creating friction with their clothing.
C. a social signal that evolved to alert adults to take action.
D. a maladaptive response that wastes energy.
Answer: A
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A) caspases. B) death-promoting proteins. C) mitochondria. D) Bcl-2. E) calcium ions
The scissors in the figure represent
a. restriction enzymes. b. reverse transcriptases. c. DNA polymerases. d. RNA polymerases. e. DNA ligases.
When you boil egg white (albumin is protein) you have
A. inhibited the protein. B. denatured the protein. C. competed with the protein. D. optimized the protein.
Characteristics that have arisen as a result of common evolutionary descent are said to be
A) Shared characteristics B) Derived Characteristics