*Question*
Q: What process is the primary function of the branching internal tubules called protonephridia? Choices: - thermoregulation - calcification - enculturation - osmoregulation A:
**Answer**
osmoregulation

*Question*
Q: What is the distance something travels in a given amount of time called? Choices: - revolution - circulation - coverage - speed A:
**Answer**
speed

*Question*
Q: What scientific word, which gives its name to a type of rock, means "to change form"? Choices: - evaporation - evolution - igneous - metamorphism A:
**Answer**
metamorphism

*Question*
Q: What are nutrients the body needs in relatively large amounts called? Choices: - adulterants - abundances - vitamins - macronutrients A:
**Answer**
macronutrients