You return home to find that your baby brother has scattered his toy trains and trucks all over the floor of your room. As you begin to pick up the toys and put them away, you realize that even though he is just a baby, he has clearly mastered:
A. the first law of thermodynamics.
B. the second law of thermodynamics.
C. potential energy.
D. free energy.
B. the second law of thermodynamics.
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. If you place a plain, dry cracker in your mouth, you will slowly notice a sweet taste. Why? What will be an ideal response?
The ventral body cavities include
a. the thoracic cavity. b. the cranial cavity. c. the abdominopelvic cavity. d. both a and c.
In some social insects, there are individuals that do not mate or may not be fertile but help look after other members of their group. Which statement regarding this situation is true?
A) Natural selection cannot act on the genes of nonreproducers since they do not leave offspring. B) The ultimate cause of this behavior is the need to keep their group safe. C) By protecting relatives, the nonreproducers increase the probability that their genes will be passed to the next generation. D) Lack of mating is an agonistic behavior.
Which of the following procedures is currently the standard test used in the United States for evaluating the efficiency of antiseptics and disinfectants?
A) use-dilution test B) microbial death rate C) in-use test D) Kelsey-Sykes capacity test E) phenol coefficient