Answer the following statements true (T) or false (F)
1. When Schmidt-Nielsen and his colleagues followed a "pulse" of air through the respiratory system of an ostrich, it took two full cycles of inhalation and exhalation for this pulse to pass through and be exhaled.
2. Chemoreceptors for oxygen normally play the most important role in regulating breathing rate.
3. Smaller mammals typically have higher ventilation rates than large mammals.
4. The shape of the oxygen-hemoglobin dissociation curve is a straight line.
5. Asthma attacks result from contraction of the muscles surrounding the bronchioles.
1. TRUE
2. FALSE
3. TRUE
4. FALSE
5. FALSE
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You construct a life table for a plant species and find that in all cases about the same proportion of the cohort survive to the beginning of the next time interval. What would you call this?
A. a Type I survivorship curve B. a Type II survivorship curve C. a Type III survivorship curve D. a semelparous life history adaptation E. populations regulated by density-independent events
According to the endosymbiosis hypothesis ________.
A. the mitochondrion evolved from the same endosymbiont as the hydrogenosome B. the first endosymbiont was a fermentative organism C. the first endosymbiotic event involved an anaerobic bacterium D. All of the choices are correct.
The production of light by an organism is called ____.?
A. autophotoproduction
B. bioluminescence
C. luminarianism
D. autoillumination
E. bioillumination
Saxitoxin is produced by __________.
A) fungi B) bacteria C) dinoflagellates D) helminths E) protozoa