Which of the following statements is TRUE with regard to Entamoeba histolytica?
A) It reproduces by schizogony.
B) It may invade the peritoneal cavity, causing serious disease.
C) It causes a form of hepatitis.
D) It is an intracellular parasite.
E) An effective vaccine against infection is available.
B
Bloom's Taxonomy: Comprehension
Section: Protozoan Diseases of the Intestinal Tract
Learning Outcome: 23.26
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Which of the following statements about the effects of deforestation on terrestrial ecosystems are true? Check all that apply.
_____ At present rates of deforestation, it is predicted that all of the world's tropical rain forests will be degraded or gone within 10 years. _____ Today, deforestation is one of the greatest problems facing terrestrial ecosystems. _____ Deforestation usually leads to the over-accumulation of nutrients such as nitrates/nitrites in the soil. _____ Deforestation can lead to loss of topsoil. _____ Deforestation can lead to eutrophication of aquatic ecosystems.
Enhancers are the binding sites for the
A. specific transcription factors. B. promoters of DNA synthesis. C. suppressor factors. D. co-activation factors. E. mediator factors.
The movement of water through a selectively permeable membrane from areas of high concentration to areas of low concentration until equilibrium is reached can be described as ________
A) active transport B) diffusion C) osmosis D) All of the above are true.
A hemoglobin molecule is formed when four independent proteins interact with one another; hemoglobin demonstrates the _____ level of protein organization.
A) primary B) secondary C) tertiary D) quaternary E) pentary