The Regime Shift from Kelp Forests to Urchin Barrens Along

question 50

Multiple Choice

The regime shift from kelp forests to urchin barrens along the west coast of the United States illustrates how human actions have caused communities to shift to alternate states. This particular shift was caused because of a decline in sea otters, most likely due to hunting. Why would the reintroduction or protection of sea otters not return the system to its original state?

• A) Hysteresis suggests that some regime shifts are incredibly difficult to reverse.
• B) Sea otters are not the only predator on sea urchins.
• C) The increase of orcas (a predator of sea otters) will continue to suppress otter populations.
• D) Urchin barrens are the climax community for coastal ecosystems.

Describe the structure and function of prokaryotic cell layers.

Assess the accuracy of information comparing prokaryotic and eukaryotic cells.

Comprehend various types of microscopy techniques and their resolution capabilities.

Recognize the functions of the cell membrane and structures involved in cellular protection and transport.

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Definitions:

Reframing

Reframing involves changing the way a situation or experience is viewed or interpreted, often to see it in a more positive or constructive light.

Selective Serotonin Reuptake Inhibitors

A class of medications used to treat depression and anxiety disorders by increasing the levels of serotonin in the brain.

Antidepressants

Medications designed to improve symptoms of depression by altering chemical activity in the brain related to mood regulation.

Side Effects

Unintended reactions or outcomes that occur in addition to the desired therapeutic effect of a medication or treatment.