To promote ecotourism, Costa Rica adopted a novel PSA program. What does PSA stand for?
A. Public Service Announcement
B. Public Services Assessment
C. Payment for Environmental Services - Pago por Servicios Ambientales
D. Protection for Area Services
E. Ecological Services for People
Ans: C. Payment for Environmental Services - Pago por Servicios Ambientales
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The limit of resolution can best be defined as
A) the distance that an object must be moved to be distinguished from its background. B) the inverse of the wavelength of light; it is greatest for black light. C) the distance that two objects must be apart to be distinguished as separate objects. D) the solvent that must be available to remix a solution. E) the magnification power of a microscope.
Blood O2 levels have the greatest influence on mammalian breathing rate
Indicate whether the statement is true or false.
Which of the following statements about the cells of the mucous membrane lining air tubes of humans is false?
A) They manufacture secretory products. B) They are stratified squamous epithelial cells. C) They are cuboidal or columnar in shape. D) They have cilia that collect and transport mucus up and out of the respiratory system.
Bacteria that are used as biosensors
A) migrate to the hazardous chemical. B) do not emit light in the presence of a hazardous chemical. C) degrade hazardous chemicals. D) have chlorophyll. E) may use the lux operon.