Humans intrude into the nitrogen cycle by
A. disposing of human manure rather than allowing it to recycle.
B. manufacturing nitrogen compounds to apply to agricultural fields.
C. using antibiotics that destroy important bacteria in the nitrogen cycle.
D. tying up nitrogen in human body mass because of overpopulation.
Answer: B
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a. the ectoderm. b. the endoderm. c. the mesoderm. d. two of the germ layers. e. all of the germ layers.
Which of the following situations would be MORE effectively handled with emotion-focused rather than problem-focused coping?
A. You are too sick to make it to your final exam in chemistry, the last class you need before graduation. B. Your best friend is being treated for testicular cancer. C. You have very little money, your dog is very sick, and your insurance plan doesn't cover pets. D. You really need a new car.
Which of the following parts of the Golgi complex receives materials from the ER?
A. Cisternal edges B. Cis face C. Trans face D. None of the choices are correct.
What is the term for organisms in which internally-fertilized eggs are laid to develop and hatch outside the mother's body?
A. Viviparous B. Marsupial C. Ovoviviparous D. Placental E. Oviparous