Dendritic cells are phagocytes with antigen-presenting properties
Indicate whether the statement is true or false.
Answer: TRUE
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What is the function of polar bodies?
A. They provide nourishment for the developing embryo. B. They prevent more than one sperm from entering the egg. C. They produce hormones that allow ova to develop properly. D. They provide fructose to the semen for sperm motility. E. None of these are functions of polar bodies.
A scientific theory is
A. a way to organize how we think about a problem. B. a way to understand a complex system by reducing it to its working parts. C. a suggested explanation that accounts for observations. D. a concept that is supported by experimental evidence that explains the facts in an area of study.
The most precise method of obtaining estimates of the absolute ages of geological deposits is to
A. apply the principle of superposition (younger deposits above older deposits). B. measure the ratios of various radioactive isotopes in the deposits. C. measure rates of sedimentary rock formation. D. make salinity measurements in ocean sediment deposits. E. study the sequence of fossil types in the deposits.
Which of the following is not a factor in increased incidence of fungal infections?
A) urban development B) increasing antibiotic resistance C) climate change D) deforestation E) increasing number of people living with immunosuppression