Answer the following question given this paragraph: During anaphase , sister chromatids separate and the centromeres divide. The sister chromatids are pulled apart by the shortening of the spindle fibers. This is like reeling in a fish by shortening the fishing line. One sister chromatid moves to one pole of the cell, and the other sister chromatid moves to the opposite pole. At the end of anaphase, each pole of the cell has a complete set of chromosomes. Q: During which phase do sister chromatids separate and the centromeres divide? Choices: - cell phase - gap cycle - passivation - anaphase A:
anaphase
(Question)
Answer the following question given this paragraph: Roundworms have organ-level organization, in which two or more types of tissues work together to perform a particular function as an organ. For example, a roundworm has a primitive brain that controls how the organism responds to the environment. Q: Roundworms exemplify what type of organization, where two or more types of tissues work together to perform a particular function as an organ? Choices: - bone-level organization - land-level organization - delicate - level organization - organ-level organization A:
(Answer)
organ-level organization
Ques: Answer the following question given this paragraph: Mechanical Digestion in the Small Intestine The movement of intestinal smooth muscles includes both segmentation and a form of peristalsis called migrating motility complexes. The kind of peristaltic mixing waves seen in the stomach are not observed here. If you could see into the small intestine when it was going through segmentation, it would look as if the contents were being shoved incrementally back and forth, as the rings of smooth muscle repeatedly contract and then relax. Segmentation in the small intestine does not force chyme through the tract. Instead, it combines the chyme with digestive juices and pushes food particles against the mucosa to be absorbed. The duodenum is where the most rapid segmentation occurs, at a rate of about 12 times per minute. In the ileum, segmentations are only about eight times per minute (Figure 23.20). Q: During what in the small intestine do rings of smooth muscle repeatedly contract and then relax? Choices: - mitosis - contraction - compression - segmentation A:
Ans: segmentation
(Q).
Answer the following question given this paragraph: Sonar uses ultrasound in a way that is similar to echolocation. Sonar stands for so und na vigation and r anging. It is used to locate underwater objects such as sunken ships or to determine how deep the water is. A sonar device is usually located on a boat at the surface of the water. The device is both a sender and a receiver (see Figure below ). It sends out ultrasound waves and detects reflected waves that bounce off underwater objects or the bottom of the water. If you watch the video at the URL below, you can see how sonar is used on a submarine. Q: What tool, used to locate underwater objects, utilizes ultrasound in a way that is similar to echolocation? Choices: - GPS - radar - scanning - sonar A:
(A).
sonar
Ques:Answer the following question given this paragraph: The Moon has no atmosphere. With no atmosphere, the Moon is not protected from extreme temperatures. The average surface temperature during the day is approximately 107C (225F). Daytime temperatures can reach as high as 123C (253F). At night, the average temperature drops to -153C (-243F). The lowest temperatures measured are as low as -233C (-397F). Q: What does the moon not have to protect it from extreme temperatures? Choices: - oceans - metals - oxygen - atmosphere A:

Ans:atmosphere
Ques:Answer the following question given this paragraph: Magnetite crystals of different ages and on different continents pointed to different spots. The simplest explanation is that the continents have moved. Q: Magnetite crystals of different ages and on different continents pointed to different spots. the simplest explanation is that the continents have done what? Choices: - reacted - changed - evolved - moved A:

Ans:
moved