Blood is moved through the vascular system by

A. valves in the wall of the blood vessels.

B. peristalsis caused by smooth muscle in the blood vessel walls.

C. pressure gradients created by the heart.

D. osmotic pressure.

E viscosity of the blood

Real life example of block and tackle

What do all four of these molecules Carbohydrates, proteins, lipids, and nucleic acids have in common? a. They dissolve in water. b. They store energy. c. They store and transfer information. d. They are found in living things.

The water carrier's principal competitor for the movement of grain, coal, and ores is which mode of transportation? a. pipelines b. Canadian and foreign owned water carriers c. railroads d. motor carriers

Imagine that a researcher claimed to have created a genetically modified plant that produces twice as much energy as it harnesses from its environment. how could this be possible

Does stress affect your five senses?

What is the name of the classification system that we still use today

Compare the roles of the phospholipid bilayer in passive and active transport.

In the polymerase chain reaction (PCR) technique, a heating phase and a cooling phase alternate. An original sample of DNA would have to pass through how many total rounds of heating and cooling before a sample is increased eight times in quantity?

During interphase, replication of the genome DNA occurs during what phase of the cell cycle

Which of the following is not recycle in the biosphere A: energy b:nitrogen c:water d:carbon