Most robins, a type of bird, produce four to five eggs at a time. Those robins that produce fewer or more than this have reduced fitness. Which of the following terms best describes this? A. artificial selection
B. directional selection
C. disruptive selection
D. stabilizing selection

Scientific method and data analysisa biology student wanted to determine if there is a relationship between resting heart rate and bodyheight. she gathered information from 12 classmates and constructed the table below. resting heart rate (beats per minute)student height (cm)155. 156156165180180190194195

An ecologist is studying the effects that a population of predators is having on a population of a prey. he used data from the field to produce this graph. which conclusion can draw from the graph?

Acell in the human nervous system whose primary function is to form myelin and the blood-brain barrier, respond to injury, remove debris, and enhance learning and memory is called a(n) cell.