In Part 2 of the Biomass Pyramid simulation, greater canopy openness was associated with greater numbers of catfish.

You are caring for a patient who suffers from insomnia. The patient asks you about trizolam, knowing that her grandfather used it to treat his insomnia. You inform the patient that we know have newer agents such as _______, which can be better tolerated because they are more selective at the ________ subunit of the GABA receptor.

Aripiprazole is more selective than other atypical antipsychotics in that it preferentially: 

What does Desulfovibrio produce to support the growth of green and purple sulfur bacteria?

You are working in the emergency department when a frantic patient rushes in to tell you that his limbs are decaying and he is worried they are going to fall off. You examine the patient and determine that he and his limbs are intact and subsequently suspect LSD or some other psychedelic toxicity. You help the patient recover by administering which of the following drugs:

Which of the following does NOT correctly pair a drug used for the treatment of opioid toxicity and detoxification with its mechanism of action: 

Venlafaxine (Effexor ®) and Duloxetine (Cymbalta ®) are both examples of what drug class?

When comparing the Sahara Desert in Africa with the tropical forests of SE Asia, the tropical forest had both much higher temperatures, as well as much higher levels of precipitation, year-round.

Winogradsky columns are ecosystems in which the byproducts from one group of organisms support the growth of another group of organisms.

In the Winogradsky columns that contain egg yolk,  how will sulfide be distributed throughout the column?