Examine the flux diagrams in Figure 25.6 to address the following questions. What is the difference in the rate of carbon exchange (in gigatons per year of carbon) between photosynthesis and respiration in the terrestrial environment?
What will be an ideal response?
120 - 119 = 1 gigaton/yr
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One application of GMOs is to engineer mice that have particular diseases that scientists wish to study
A. true B. false
Which are essentially equivalent treatments?
A. Dry 200?C heat for 1.5 hours; wet 121?C heat for 15 minutes B. Dry 160?C heat for 1.0 hour; wet 200?C heat for 30 minutes C. Dry 121?C heat for 1.5 hours; wet 200?C heat for 15 minutes D. Dry 100?C heat for 2.0 hours; wet 100?C heat for 30 minutes
You are given a sample of tissue to identify. The cells contain large amounts of protein arranged in stripes. When an electrical charge is applied to it, the tissue twitches and then relaxes. You classify this sample as ________ tissue
A) adipose B) stratified epithelial C) loose connective D) simple epithelial E) skeletal muscle
Viruses, Rickettsia, and Chlamydia are described as obligate intracellular parasites because they can only be propagated inside living host cells. Which of the following would be appropriate for their cultivation?
A. enriched media B. differential media C. cell or tissue cultures D. media that contains sheep red blood cells