Question
Since lower values of this quantity corresponded with higher metabolic rates, Max Rubner proposed the “heartbeat hypothesis” that lower values of it lead to a lower lifespan. For 10 points each:
[10m] Name this quantity studied in allometry. Metabolic rate scales to the three-fourths power of this quantity according to Kleiber’s law.
ANSWER: body size [or body mass or body volume]
[10e] These animals have the highest metabolic rate among vertebrates. As a result, species in this smallest family of birds need special mechanisms to regulate body heat while hovering in place.
ANSWER: hummingbirds [or Trochilidae; prompt on Apodiformes]
[10h] Many cold-blooded, ectothermic organisms exhibit this type of thermoregulation, where internal temperature varies wildly based on the ambient temperature. Sloths and naked mole rats exhibit this type of thermoregulation, which is the opposite of homeothermic regulation.
ANSWER: poikilothermic regulation
<Purdue, Biology>
Summary
| California | 2025-02-01 | Y | 2 | 20.00 | 100% | 100% | 0% |
| Great Lakes | 2025-02-01 | Y | 3 | 10.00 | 100% | 0% | 0% |
| Lower Mid-Atlantic | 2025-02-01 | Y | 4 | 12.50 | 100% | 25% | 0% |
| Midwest | 2025-02-01 | Y | 6 | 18.33 | 100% | 67% | 17% |
| North | 2025-02-01 | Y | 2 | 20.00 | 100% | 100% | 0% |
| Northeast | 2025-02-01 | Y | 2 | 10.00 | 100% | 0% | 0% |
| Pacific Northwest | 2025-02-01 | Y | 1 | 20.00 | 100% | 100% | 0% |
| South Central | 2025-02-01 | Y | 1 | 10.00 | 100% | 0% | 0% |
| Southeast | 2025-02-01 | Y | 1 | 10.00 | 100% | 0% | 0% |
| Upper Mid-Atlantic | 2025-02-01 | Y | 6 | 18.33 | 100% | 83% | 0% |
| Upstate NY | 2025-02-01 | Y | 2 | 15.00 | 100% | 50% | 0% |
Data
| Texas A | ASU | 0 | 10 | 0 | 10 |