What condition results in secondary succession?
a. the formation of a tall sand dune on a previously grassy beach
b. a vast glacier in motion forming a u-shaped valley on its wake
c. a volcanic eruption that covers most of what used to be a forest
d. an introduced species that devastates native plants as it feeds

What kind of bond is created by the attraction between atomic particles of opposite charge? ionic bond hydrogen bond covalent bond nuclear bond

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

This is a situation in which genes are attached to an organism's sex chromosomes; the sex of an organism influences the expression of a gene.