Answer the following question given this paragraph: The solution to the last part of the example shows that speed is inversely proportional to the square of the radius of the tube, making for large effects when radius varies. We can blow out a candle at quite a distance, for example, by pursing our lips, whereas blowing on a candle with our mouth wide open is quite ineffective. In many situations, including in the cardiovascular system, branching of the flow occurs. The blood is pumped from the heart into arteries that subdivide into smaller arteries (arterioles) which branch into very fine vessels called capillaries. In this situation, continuity of flow is maintained but it is the sum of the flow rates in each of the branches in any portion along the tube that is maintained. The equation of continuity in a more general form becomes . Q: In the body, what essential substance is pumped from the heart into arteries and then eventually into capillaries? Choices: - spinal fluid - water - lymphatic Fluid - blood A:
blood
Answer the following question given this paragraph: Most biochemical reactions take place within cells. Cells are the microscopic building blocks of organisms. Q: Where do most biochemical reactions take place? Choices: - stomach - upper atmosphere - outside of cells - within cells A:
within cells
Q: Answer the following question given this paragraph: Scientists also have to "check their work. " The results of an investigation are not likely to be well accepted unless the investigation is repeatedusually many timesand the same result is always obtained. Getting the same result when an experiment is repeated is called replication . If research results can be replicated, it means they are more likely to be correct. Repeated replication of investigations may turn a hypothesis into a theory. On the other hand, if results cannot be replicated they are likely to be incorrect. Q: Getting the same result when an experiment is repeated is called what? Choices: - mutation - initiation - repetition - replication A:
A: replication
Question: Answer the following question given this paragraph: The canister on the left contains a gas at a certain pressure. The attached air pump is then used to double the amount of gas in the canister. Since the canister cannot expand, the increased number of air molecules will strike the inside walls of the canister twice as frequently as they did before. The result is that the pressure inside the canister doubles. As you might imagine, if more and more air is continually added to a rigid container, it may eventually burst. Reducing the number of molecules in a rigid container has the opposite effect and the pressure decreases. Q: Reducing the number of molecules in a rigid container causes what to decrease? Choices: - velocity - demand - energy - pressure A:
Answer: pressure
*Question*
Answer the following question given this paragraph: Some prokaryotes form structures consisting of many individual cells, like the cells in Figure below . This is called a biofilm. A biofilm is a colony of prokaryotes that is stuck to a surface. The surface might be a rock or a host's tissues. The sticky plaque that collects on your teeth between brushings is a biofilm. It consists of millions of prokaryotic cells. Q: A biofilm is a colony of prokaryotes that is stuck to what? Choices: - the middle - the bottom - skin - surface A:
**Answer**
surface
(Q).
Answer the following question given this paragraph: A small child darts in front of your bike as you race down the street. You see the child and immediately react. You put on the brakes, steer away from the child, and yell out a warning, all in just a split second. How do you respond so quickly? Such rapid responses are controlled by your nervous system. The nervous system is a complex network of nervous tissue that carries electrical messages throughout the body. It includes the brain and spinal cord, the central nervous system , and nerves that run throughout the body, the peripheral nervous system (see Figure below ). To understand how nervous messages can travel so quickly, you need to know more about nerve cells. Q: What is the complex network of nervous tissue that carries electrical messages throughout the body? Choices: - respiratory system - circulatory system - lymphatic system - nervous system A:
(A).
nervous system