A person walks through the woods. A branch falls suddenly, almost hitting him, and his heart suddenly starts racing. What part of his nervous system causes his heart to race?

List the characteristics of good biological drawing.

What organisms respire? Neither plants nor animals only animals only plants Plants and aminals both

On nights when we see the new Moon phase, what side of the moon are we seeing?

Compare and contrast freezing rain, sleet, and hail

Surface anatomy is the study of shapes and structures on the surface of the body, as they relate to deeper structures. shapes and structures of the internal organs of the body, as they relate to the organ system that they belong to.

True or false: natural resources can be man made

A scientist is studying a region of an ocean floor she discovers a long deep canyon that runs parallel to the coastline of a nearby continent what can she inferred from her discovery

The head ct results have come back, and here is what they show: there is no sign of tumor, bleeding, or skull trauma. in fact, the only abnormality is that the ventricles are slightly smaller than normal.

Genetic variation is important for evolution because

What is the term for a structure that has no use in an organism? A) homologous B) Index C) Vestigial D) Sedimentary