The circulatory, or cardiovascular system, is composed of

a. heart, arteries and veins.

b. lungs, heart and brain.

c. heart, blood and blood vessels.

d. lungs, blood vessels and heart.

If energy is needed to remove a phosphate group from a chain in ATP, you can conclude that the energy needed for production must be A Found outside the cell to maintain balance within B. Proportional to the amount of food taken in by the cell C.

When you place a ball at the top of a hill and it accelerates toward the bottom of the hill, it probably also experiences both and O A. sliding friction, rolling friction O B. rolling friction, air resistance O c.

How does natural selection change the frequency of genes or traits over many generations? Biology students conducted an experiment mimicking genetic variation and coloration.

SaturatedUnsaturated fats remain in liquid form at room temperature

Which event is the most likely cause for the four periods when punctuated equilibrium seems to have occurred

During sleep, the body provides fuel to the brain during sleep, the body provides fuel to the brain by breaking down body proteins. by converting glucose to glycogen. the body does not provide fuel to the brain during sleep. by engaging in ketosis

What happens to glucose inside a cell during cellular respiration? A. The cell uses ATP to break down glucose. B. The cell uses oxygen to break down glucose. C. The cell uses water to break down glucose. D.

The burning of fossil fuels has harmed the environment by

What is a type of research that involves observation and collecting data but does not include control

Forms of the Ras protein found in tumors usually cause which of the following? A) DNA replication to stop B) DNA replication to be hyperactive C) cell-to-cell adhesion to be nonfunctional D) cell division to cease E) growth factor signaling to be