Answer the following question given this paragraph: Four electron groups orient themselves in the shape of a tetrahedron. Q: Four electron groups orient themselves into what shape that has four faces? Choices: - spherical - multicellular - circular - tetrahedron A:
tetrahedron
(Question)
Answer the following question given this paragraph: Q: Much of what type of radiation that strikes the planet is reflected back into space? Choices: - magentic radiation - gamma rays - microwaves - solar radiation A:
(Answer)
solar radiation
Ques: Answer the following question given this paragraph: stretch receptors. This stimulates parasympathetic neurons to release acetylcholine, which then provokes increased secretion of gastric juice. Partially digested proteins, caffeine, and rising pH stimulate the release of gastrin from enteroendocrine G cells, which in turn induces parietal cells to increase their production of HCl, which is needed to create an acidic environment for the conversion of pepsinogen to pepsin, and protein digestion. Additionally, the release of gastrin activates vigorous smooth muscle contractions. However, it should be noted that the stomach does have a natural means of avoiding excessive acid secretion and potential heartburn. Whenever pH levels drop too low, cells in the stomach react by suspending HCl secretion and increasing mucous secretions. The intestinal phase of gastric secretion has both excitatory and inhibitory elements. The duodenum has a major role in regulating the stomach and its emptying. When partially digested food fills the duodenum, intestinal mucosal cells release a hormone called intestinal (enteric) gastrin, which further excites gastric juice secretion. This stimulatory activity is brief, however, because when the intestine distends with chyme, the enterogastric reflex inhibits secretion. One of the effects of this reflex is to close the pyloric sphincter, which blocks additional chyme from entering the duodenum. Q: The duodenum has a major role in regulating what digestive organ and its emptying? Choices: - kidneys - skin - respiratory - stomach A:
Ans: stomach
(Q).
Answer the following question given this paragraph: Organisms are not independent, they are interdependent . They cannot live alone; they need other organisms to survive. The same is true for species. All species need other species to survive. Q: Organisms cannot live alone, needing other organisms to survive; what is this relationship called? Choices: - coexistence - independence - dominance - interdependence A:
(A).
interdependence
Ques:Answer the following question given this paragraph: The wavelength of visible light determines the color that the light appears. Light with the longest wavelength appears red, and light with the shortest wavelength appears violet. In between are the wavelengths of all the other colors of light. Q: Light with the shortest wavelength appears as what color? Choices: - red - green - blue - violet A:

Ans:violet
Question: Answer the following question given this paragraph: Refer again to water's phase diagram ( Figure above ). Notice point E, labeled the critical point . What does that mean? At 373.99C, particles of water in the gas phase are moving very, very rapidly. At any temperature higher than that, the gas phase cannot be made to liquefy, no matter how much pressure is applied to the gas. The critical pressure (P c ) is the pressure that must be applied to the gas at the critical temperature in order to turn it into a liquid. For water, the critical pressure is very high, 217.75 atm. The critical point is the intersection point of the critical temperature and the critical pressure. Q: What is the intersection point of the critical temperature and the critical pressure called? Choices: - instance point - basic juncture - peak point - critical point A:
Answer:
critical point