After Reading the Paragraph Below, Answer the Questions That Follow

question 24

Multiple Choice

After reading the paragraph below, answer the questions that follow.
Scientists interested in knowing the best way to restore an area after a temporary road was built through it completed a study comparing two treatments: (1) restoring the contour of an area so that there was no longer a depression or cut-through where the road was previously and (2) simply abandoning the area to allow vegetation to return on its own. They wanted to know whether either or both of these treatments would return the aboveground vegetation and the belowground soil properties to their original state, as seen in a similar area where there had never been a road.
-Which of the following best describes the data that the scientists should collect and how they should be compared?

• A)comparison of plant species in the recontoured area, the abandoned area, and the never-roaded area
• B)comparison of properties of soil and plant species in the contoured area and abandoned area
• C)comparison of soil properties and species of plants present in the contoured area with the never-roaded area and of the abandoned area with the never-roaded area.
• D)comparison of soil properties only among all three areas since soil properties will determine plant species

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Definitions:

Multipolar

A type of neuron that contains one axon and multiple dendrites, allowing for the transmission of nerve impulses to and from various connections.

Resting Membrane Potential

The electrical charge difference across the cell membrane when the cell is not actively transmitting signals, typically around -70mV for neurons.

Local Potential

Depolarization that is not propagated and that is graded or proportional to the strength of the stimulus.

Summate

To add together or accumulate to a total; in physiology, refers to the additive effect of repeated stimuli on a nerve or muscle.