Q: What term refers to the breaking stress that will cause permanent deformation or fracture of a material? Read this paragraph and choose the correct option from the provided answers: makes it clear that the deformation is proportional to the applied force. Figure 5.13 shows the Hooke's law relationship between the extension L of a spring or of a human bone. For metals or springs, the straight line region in which Hooke's law pertains is much larger. Bones are brittle and the elastic region is small and the fracture abrupt. Eventually a large enough stress to the material will cause it to break or fracture. Tensile strength is the breaking stress that will cause permanent deformation or fracture of a material. Hooke's Law. Choices: - elasticity - malleability - viscosity - tensile strength A:
tensile strength

(Question)
Q: Which two planetary bodies have humans walked on? Read this paragraph and choose the correct option from the provided answers: Humans have walked on only two planetary bodies: Earth and the Moon. The footprints the men left behind are the first signs of life ever on the Moon. Scientists learned a great deal about the Moon from the Apollo missions. The samples that were brought back have been studied in laboratories. We know an incredible amount about the Moon because of these samples. Having these rocks radically changed our thinking about the Moon. Choices: - Mars and Jupiter - The Sun and Mars - Earth and Saturn - earth and the moon A:
(Answer)
earth and the moon

Ques: Q: What do you call the relationship in which members of one species consume members of another species? Read this paragraph and choose the correct option from the provided answers: Predation is a relationship in which members of one species consume members of another species. The consuming species is called the predator. The species that is consumed is called the prey. In Figure below , the wolves are predators, and the moose is their prey. Choices: - parasitism - competition - exploitation - predation A:
Ans: predation

(Q).
Q: What does the decomposition of dead organisms and organic waste release into the atmosphere, soil, or ocean? Read this paragraph and choose the correct option from the provided answers: Decomposition of dead organisms and organic wastes releases carbon back to the atmosphere, soil, or ocean. Choices: - nitrogen - oxygen - hydrogen - carbon A:
(A).
carbon

Ques:Q: The hepatitis virus attacks only cells of what organ? Read this paragraph and choose the correct option from the provided answers: How Viruses Infect Specific Organs Specific glycoprotein molecules exposed on the surface of the cell membranes of host cells are exploited by many viruses to infect specific organs. For example, HIV is able to penetrate the plasma membranes of specific kinds of white blood cells called T-helper cells and monocytes, as well as some cells of the central nervous system. The hepatitis virus attacks only liver cells. These viruses are able to invade these cells, because the cells have binding sites on their surfaces that the viruses have exploited with equally specific glycoproteins in their coats. (Figure 3.19). The cell is tricked by the mimicry of the virus coat molecules, and the virus is able to enter the cell. Other recognition sites on the virus's surface interact with the human immune system, prompting the body to produce antibodies. Antibodies are made in response to the antigens (or proteins associated with invasive pathogens). These same sites serve as places for antibodies to attach, and either destroy or inhibit the activity of the virus. Unfortunately, these sites on HIV are encoded by genes that change quickly, making the production of an effective vaccine against the virus very difficult. The virus population within an infected individual quickly evolves through mutation into different populations, or variants, distinguished by differences in these recognition sites. This rapid change of viral surface markers decreases the effectiveness of the person's immune system in attacking the virus, because the antibodies will not recognize the new variations of the surface patterns. Choices: - lungs - kidney - brain - liver A:

Ans:liver

Question: Q: What are molecules that the immune system recognize as foreign to the body? Read this paragraph and choose the correct option from the provided answers: The average kinetic energy of atoms (each of mass and average speed ) in a gas is related to the temperature of the gas, measured in Kelvin. The Boltzmann constant is a constant of nature, equal to. Choices: - viruses - peptides - tumors - antigens A:
Answer:
antigens