Which of the following statements about the indirect value of trees is not true?
A. They provide shade and reduce the need for fans and air conditioning.
B. In forests, they exert a natural "sponge effect" for the provision of freshwater.
C. They break down dead organic matter and other types of wastes.
D. Globally, they stabilize the climate because they take up carbon dioxide.
E. They retain soil and prevent soil erosion.
Answer: C
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Microbial plastics are composed of
A) polysaccharides. B) polyhydroxyalkanoates. C) polyaromatic hydrocarbons. D) xenobiotics.
Gardasil is marketed as a cervical cancer vaccine, but it is actually a human papilloma virus (HPV) vaccine. Why is this done?
A. The virus multiplies more rapidly in cancerous cells. B. Cancer cells are particularly susceptible to viral infection. C. Genital warts is a sign of cancer. D. HPV in the cervical epithelial cells may cause the cells to become cancerous. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about the link between viruses and cancer? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The northern boundary of the distribution of Saguaro cacti is defined by
A. areas in which temperatures do not drop below freezing. B. the availability of water year round. C. the presence of pollinating insects. D. proximity to coastal environments. E. the frequency of low-intensity fires.
Describe the differences between saturated and unsaturated fatty acids. Which is most likely to be solid at room temperature? Why?
What will be an ideal response?