Which of the following is considered the opposite of endocytosis?
a. Pinocytosis
b. Phagocytosis
c. Exocytosis
d. Receptor-mediated endocytosis
c. Exocytosis
Exocytosis is considered the opposite of endocytosis.
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Which of the following is a true statement regarding species diversity and taxonomic diversity?
A) Species diversity measures the relative frequency of all alleles present in a species. B) In taxonomic diversity, the evolutionary relationships of species in a lineage are important. C) In species diversity, the number of animals in a particular lineage is important. D) The variety of species in a given area represents taxonomic diversity.
If primary production increases in an ecosystem, it would be reasonable to expect that
A. nutrients are a limiting factor. B. gross production would not increase. C. cellular respiration would increase. D. the trophic web has become more complex. E. the biomass of herbivores would increase.
What is the current status of gene therapy?
a. It is currently being used effectively to cure cystic fibrosis. b. It has been terminated because clinical trials have shown it to be ineffective. c. It is being evaluated to assess the risks associated with potential side effects. d. The number of clinical trials is increasing at an almost uncontrollable rate. e. It may be considered in the future, but currently the technology is not available.
Host-microbe interactions
A) do not involve host factors. B) never result in the normal species of the microbiota causing disease. C) are generally commensal. D) are always harmful. E) involve a dynamic give-and-take between the microbe and the host.