Select the statement that is correct regarding Chagas disease.
A. It is caused by a fungal pathogen.
B. Late-stage disease is characterized by autoimmune reactions in the host.
C. An effective vaccine is available for prevention in endemic areas.
D. It is transmitted by respiratory droplets.
Answer: B
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Which level of ecological study focuses the most on abiotic factors?
A) speciation ecology B) population ecology C) community ecology D) ecosystem ecology
Diazotrophs are found in all three domains of life
Indicate whether the statement is true or false.
Which of the following statements is false?
A. The use of antibiotics causes mutations in bacteria for antibiotic resistance. B. Once evolved, antibiotic resistance can be passed between different species of bacteria. C. Failure to complete a course of antibiotics selects for pathogens that are least susceptible to antibiotics. D. Some diseases, such as tuberculosis, have strains that are so antibiotic resistant that they are essentially untreatable. E. None of the answer options is false.
In the context of evolution, equilibrium means
A) no individuals move into or out of the population. B) no change in population size. C) no change in allele frequency. D) equal numbers of males and females. E) equal numbers of all alleles.