Which is made up of lipids?
a. steroids
b. peptides
c. prostaglandins

Which of the following diseases may be transmitted through an accidental needle stick? a. syphilis b. tuberculosis c. cellulitis d. hepatitis b

Compare and contrast nutrient limitation in soil vs. nutrient limitation in aquatic ecosystems

During a hot day, warm and moist air rises and cools in the atmosphere. which even would occur next on such a day? a. condensed droplets would gather to become water vapor. b. water vapor would condense into tiny droplets. c. water droplets would evaporate to form rain and snow.