During which stages of bacterial growth is an infected patient most at risk of spreading the organism to others?
A. lag phase and exponential growth phase
B. exponential growth phase and stationary growth phase
C. stationary growth phase and death phase
D. exponential growth phase, stationary growth phase, and death phase
Ans: B. exponential growth phase and stationary growth phase
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Amniotes differ from amphibians by ____
a. their size b. possession of lungs c. internal fertilization d. laying of eggs e. being tetrapods
Endoskeletons are shed in the process of ecdysis
____________________ Indicate whether the statement is true or false.
Synthetic organic compounds such are chlorofluorocarbons (CFCs) are damaging to the world's fresh water supply.
a. true b. false
Which of the following is a plausible reason for why it may be difficult to treat infections that arise from tooth decay?
A) Biofilm bacteria that cause tooth decay begin to produce endospores as a means to deter effects of antibiotics. B) Binary fission in biofilm bacteria that cause tooth decay begins to decrease as the biofilm community becomes more complex, thereby producing fewer bacterial cells for antibiotics to penetrate. C) As the biofilm that causes tooth decay becomes larger, its structure makes it difficult for antibiotics to break through bacterial cell walls. D) Bacteria of the biofilm that cause tooth decay form a symbiotic relationship with the antibiotics and therefore diminish antibiotic effectiveness.