Answer the following question given this paragraph: The kidneys help the body maintain homeostasis in several ways. They filter all the blood in the body many times each day and produce urine. They control the amount of water and dissolved substances in the blood by excreting more or less of them in urine. Q: Which body organ filters the blood in the body and creates urine? Choices: - intestines - liver - the arteries - the kidneys A:
the kidneys
(Question)
Answer the following question given this paragraph: Did you ever hear an echo of your own voice? An echo occurs when sound waves bounce back from a hard object. The man in Figure below is trying to create an echo by shouting toward a rock wall. When the sound waves strike the rock wall, they can't pass through. Instead, they bounce back toward the man, and he hears an echo of his voice. An echo is just one example of how waves interact with matter. Q: What sound can be heard when sound waves bounce back from a hard object? Choices: - loop - eerie - boom - echo A:
(Answer)
echo
Ques: Answer the following question given this paragraph: Scanning acoustic microscopes use sound waves to scan a specimen. These microscopes are useful in biology and medical research. Q: Scanning acoustic microscopes use what kind of waves to scan a specimen? Choices: - radio waves - heat waves - gamma waves - sound waves A:
Ans: sound waves
(Q).
Answer the following question given this paragraph: 4.6 Connections between Cells and Cellular Activities Animal cells communicate via their extracellular matrices and are connected to each other via tight junctions, desmosomes, and gap junctions. Plant cells are connected and communicate with each other via plasmodesmata. When protein receptors on the surface of the plasma membrane of an animal cell bind to a substance in the extracellular matrix, a chain of reactions begins that changes activities taking place within the cell. Plasmodesmata are channels between adjacent plant cells, while gap junctions are channels between adjacent animal cells. However, their structures are quite different. A tight junction is a watertight seal between two adjacent cells, while a desmosome acts like a spot weld. Q: Plasmodesmata and gap junctions are channels between adjacent cells of what respective types? Choices: - healthy and sick - new and old - plant and fungus - plant and animal A:
(A).
plant and animal
Ques:Answer the following question given this paragraph: An underwater earthquake creates a tsunami this way: The movement of the crust displaces water. The displacement forms a set of waves. The waves travel at jet speed through the ocean. Since the waves have low amplitudes and long wavelengths, they are unnoticed in deep water. As the waves reach shore they compress. They are also pushed upward by the shore. For these reasons, tsunami can grow to enormous wave heights. Tsunami waves can cause tremendous destruction and loss of life. Fortunately, few undersea earthquakes generate tsunami. Q: What type of amplitudes and wavelengths avoid detection in deep water? Choices: - high and long - high and wide - low and wide - low and long A:

Ans:low and long
Answer the following question given this paragraph: Today most people realize that microorganisms, such as bacteria or viruses, are the cause of disease. This concept is known as the germ theory of disease, one of the few scientific theories in the field of the life sciences. Although it seems obvious now, people did not always understand the cause of disease. How does a theory such as this become established?. Q: What are the two most common causes of diseases? Choices: - bacteria and protazoa - viruses and protazoa - nutritional deficiencies - bacteria and viruses A:
bacteria and viruses