As Part of a Surveying Expedition, You Find a Hummingbird

question 100

Multiple Choice

As part of a surveying expedition, you find a hummingbird with a loss of function mutation that prevents this hummingbird from entering daily torpor. With all other variables the same, you would expect this hummingbird to _______ compared to a hummingbird that does not have this mutation.

• A) have a more constant body temperature
• B) use less energy per day
• C) be larger in size
• D) have a longer period of winter hibernation
• E) have a higher basal metabolic rate

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Definitions:

Concentration Differences

Variations in the amount of a particular substance within a given volume, leading to a gradient that can cause diffusion.

Sodium-Potassium Pump

A membrane-bound ATPase enzyme that pumps sodium out of cells while moving potassium into cells, crucial for maintaining cellular ion balance and membrane potential.

Plasma Membrane

A bi-layer of lipids and proteins that surrounds a cell, controlling the passage of substances in and out of the cell.

Membrane Potential

The electrical potential difference across a cell's plasma membrane, vital for the conduction of nerve impulses, muscle contraction, and transport processes.