Traits controlled by genes located on the sex chromosomes are described as:

Ernst Mayr’s biological species concept defines species as groups of populations that:

T.H. Morgan’s experiments with white-eyed fruit flies provided evidence that the eye-color gene is located on the:

In an experiment testing the effect of fertilizer on plant growth, the plants that receive no fertilizer represent the:

Which type of cell connection allows a chemical or electrical signal to pass directly from one cell to an adjacent cell?

Who is credited with discovering cells in 1665?

The pattern of evolution characterized by long periods of little change (stasis) punctuated by relatively rapid bursts of evolutionary change is known as:

The rapid evolution of many closely related species from a single common ancestor, often occurring on islands with abundant unexploited resources (such as Darwin’s finches), is called:

Darwin’s observations of variation among related species on the Galápagos Islands famously involved a group of:

Sympatric speciation, in which a new species arises without geographic separation from the parent species, most commonly occurs in plants through: