Ques: Q: What property is defined as the magnitude or size of displacement between two positions? Read this paragraph and choose the correct option from the provided answers: Distance Although displacement is described in terms of direction, distance is not. Distance is defined to be the magnitude or size of displacement between two positions. Note that the distance between two positions is not the same as the distance traveled between them. Distance traveled is the total length of the path traveled between two positions. Distance has no direction and, thus, no sign. For example, the distance the professor walks is 2.0 m. The distance the airplane passenger walks is 4.0 m. Misconception Alert: Distance Traveled vs. Magnitude of Displacement It is important to note that the distance traveled, however, can be greater than the magnitude of the displacement (by magnitude, we mean just the size of the displacement without regard to its direction; that is, just a number with a unit). For example, the professor could pace back and forth many times, perhaps walking a distance of 150 m during a lecture, yet still end up only 2.0 m to the right of her starting point. In this case her displacement would be +2.0 m, the magnitude of her displacement would be 2.0 m, but the distance she traveled would be 150 m. In kinematics we nearly always deal with displacement and magnitude of displacement, and almost never with distance traveled. One way to think about this is to assume you marked the start of the motion and the end of the motion. The displacement is simply the difference in the position of the two marks and is independent of the path taken in traveling between the two marks. The distance traveled, however, is the total length of the path taken between the two marks. Choices: - gravity - Distance - passing - distance A:
Ans: distance

Ques: Q: Autoimmunity can develop with time, and its causes may be rooted in this? Read this paragraph and choose the correct option from the provided answers: Autoimmunity can develop with time, and its causes may be rooted in molecular mimicry. Antibodies and TCRs may bind self antigens that are structurally similar to pathogen antigens, which the immune receptors first raised. As an example, infection with Streptococcus pyogenes (bacterium that causes strep throat) may generate antibodies or T cells that react with heart muscle, which has a similar structure to the surface of S. pyogenes. These antibodies can damage heart muscle with autoimmune attacks, leading to rheumatic fever. Insulin-dependent (Type 1) diabetes mellitus arises from a destructive inflammatory TH1 response against insulin-producing cells of the pancreas. Patients with this autoimmunity must be injected with insulin that originates from other sources. Choices: - inheritance - resistance - spontaneous mutation - molecular mimicry A:
Ans: molecular mimicry

Ques: Q: The vas deferens and ejaculatory ducts transport sperm from the epididymes to the urethra in what system? Read this paragraph and choose the correct option from the provided answers: In addition to these organs, the male reproductive system consists of a series of ducts and glands. Ducts include the vas deferens and ejaculatory ducts. They transport sperm from the epididymes to the urethra in the penis. Glands include the seminal vesicles and prostate gland. They secrete substances that become part of semen. Choices: - famous reproductive system - digestive system - cardiovascular system - male reproductive system A:
Ans: male reproductive system

Ques: Q: What do you call trees that lose their leaves in the fall and grow new ones in the spring? Read this paragraph and choose the correct option from the provided answers: Humid continental climates are found between 40 and 60 north latitude. The northeastern U. S. has this type of climate. Summers are warm to hot, and winters are cold. Precipitation is moderate, and it falls year round. Deciduous trees grow in this climate ( Figure below ). They lose their leaves in the fall and grow new ones in the spring. Choices: - perennial - fibrous - coniferous - deciduous A:
Ans:
deciduous