Because the heart beats continuously, cardiac fibers never relax completely.
Answer the following statement true (T) or false (F)
False
Cardiac fibers relax completely between contractions, which prevents fatigue.
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Which of the following is not a strategy that bacteria use to resist the action of antibiotics?
A. Altering cell membrane structure to prevent antibiotic influx. B. Cleavage of a key structural component of the antibiotic. C. Modification of the antibiotic by the acetylation or phosphorylation. D. All of the choices are correct.
Similarity in evolutionarily unrelated groups due to adaptation to similar environments is called
A. concentric evolution. B. convergent evolution. C. biogeographic evolution. D. Hardy-Weinberg equilibrium. E. both biogeographic and convergent evolution.
Which of the following is an anaerobic pathway?
a. chemiosmosis b. fermentation c. citric acid cycle d. aerobic respiration e. electron transport chain
Algae can have different types of photosynthetic pigments that allow them to photosynthesize at various depths in water.
Answer the following statement true (T) or false (F)