Which type of joint allows your legs and arms to swing in almost any direction

Which best describes the scientific method? a. a path of clearly defined steps that must be followed in a particular order b. a possible answer to a scientific question based on knowledge or research c. the recipe for how to conduct an experiment that must be followed precisely d. the process of hypothesis and testing through which scientific inquiry occurs

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm

Acodon consists of bases and specifies which will be inserted into the polypeptide chain.