Chapter 3 Lecture Quiz

1.Who was earliest recorded scholar to articulate the theory of spontaneous generation?
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3. In 1745, John Needham (1713-1781) published a report of his own experiments, in which he briefly boiled broth infused with plant or animal matter, hoping to kill all preexisting microbes. He then sealed the flasks. After a few days, Needham observed that the broth had become cloudy and a single drop contained numerous microscopic creatures. He argued that the new microbes must have arisen spontaneously.What is the likely explanation for this result?
a. None of these
b. Spontaneous generation
c. Needham likely did not boil the broth enough to kill all preexisting microbes.
d. All of the existing microbes had been killed
11. Who conducted studies to track the source of cholera outbreaks in London which ultimately resulted in the first known public health response to an epidemic? a. John Snow b. Louis Pasteur c. Ignaz Semmelweis d. Joseph ListerJohn Snow12. _________________ cells lack a nucleus. a. Eukaryotic b. Plant c. Animal d. ProkaryoticProkayotic13. When the concentration of solutes is greater on one side of the membrane, water diffuses across the membrane from the side with the lower concentration (more water) to the side with the higher concentration (less water) until the concentrations on both sides become equal. This diffusion of water is called _____________ . a. Membrane b. Potential c. Osmosis d. diffusionOsmosis14. Ribosomes are structures responsible for ________________ synthesis. a. Carbohydrate b. Lipid c. Protein d. all of theseProtein15. Eukaryotic cells possess a _____________, which is surrounded by a complex nuclear membrane that houses the ___________ . a. mitochondria, prokaryotes b. nucleus, DNA c. DNA, nucleus d. microglia, mitochondrianucleus, DNA