The structure that covers the gills is the __?

A. Lateral line

B. Operculum

C. Caudal

What substance forms in the muscles when glucose is broken down at a high rate and cannot be metabolized into adenosine triphosphate (ATP) as a result of insufficient oxygen?

Unlike perennials, annuals A. grow for two years. B. are always woody plants. C. are limited to life in a single year. D. live for many years.

Which system contains short preganglionic axons that branch extensively? somatic nervous system sympathetic nervous system parasympathetic nervous system?

What are genes composed of

Coal is of blank origin while petroleum and natural gas are of

Information flow in biological systems is necessary for negative (regulative) feedback to operate. Which of these examples does NOT involve flow of information providing feedback?

Matter is composed of?

What is least likely a description of the central nervous system

This was once a forested hillside. The county where this hill is located decided to widen the roads in the area. All of the trees and shrubs were cut down.

Some animals can produce a potassium ion concentration inside their cells that is twenty times greater than that of their environment. This ion concentration gradient is maintained by the plasma membrane.