Cancer cells often fail to respond to certain hormones because they lack these cell membrane features important in binding with those specific hormones
A) DNAs
B) dockers
C) targets
D) receptors
D
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To test for the presence of starch, one would use
(a) Benedict’s solution. (b) uncoated paper. (c) Sudan IV. (d) Lugol’s solution.
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?
Which of the following statements best describes the carbon atoms present in a seed-eating bird?
a) The carbon atoms ultimately came from simple organic compounds that formed abiotically from inorganic carbon, hydrogen, oxygen, and nitrogen atoms. b) The carbon atoms ultimately came from carbon dioxide incorporated into sugars through photosynthesis. c) Inorganic carbon atoms in the seeds were incorporated into organic molecules by the bird. d) The carbon atoms are ultimately derived from coal. e) The carbon atoms ultimately came from the soil.
Gross Primary Production =
A. Net Primary Production B. Total Ecosystem Energy C. Respiration D. 1/Net Primary Production E. Net Primary Production + Cellular Respiration