Which of the following statements concerning the microbial loop is not true?
A. Microbes consume dissolved organic matter.
B. Microbes constitute particulate organic matter for zooplankton consumption.
C. Marine viruses contribute to the production of dissolved organic matter.
D. All of the choices are correct.
Answer: D
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Gas gangrene is so named due to the formation of
A. carbon dioxide. B. oxygen. C. hydrogen. D. carbon monoxide. E. carbon dioxide AND hydrogen
A Hawaiian legend tells of a village that angered a shark god. In revenge, a "seaweed" began to grow in the tidepools that killed anyone who touched it. In fact, this "limu-make-o-Hana" -- a zoanthid cnidarian -- contains a palytoxin that locks the sodium-potassium pump open, allowing free flow of ions. If a villager suffers palytoxin poisoning, which way will the ions in his neurons flow?
Palytoxin is incredibly toxic, perhaps the second most dangerous non-peptide toxin. It targets the sodium-potassium pump, locking it open and forming a channel through which the ions can passively flow. Palytoxin is produced by zoanthid cnidarians (soft coral), and there have been incidents of poisoning from zoanthids within marine aquaria tanks in people's homes. It is also thought to be the source of the legend of the Limu make o hana ("Seaweed of Death from Hana"). A. all ions will flow out B. potassium in, sodium out C. chloride and sodium out, potassium in D. sodium in, potassium out Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content/Choose Answer · What do you already know about sodium and potassium? What other information is related to the question? 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 appendix is a vestigial structure. Which structure does it extend from?
a. the rectum b. the cecum c. the stomach d. the colon
_______ reduces the number of somatic cells in the body
Fill in the blank(s) with the appropriate word(s).