Biology Now, 2e

26 ■ CHAPTER 02 Evaluating Scientific Claims SCIENCE articles, and popular science magazines such as National Geographic, Popula ...

A Critical Choice ■ 27 The Lancet is a well-known peer- reviewed medical journal and therefore a reputable source. The paper w ...

28 ■ CHAPTER 02 Evaluating Scientific Claims SCIENCE within schools, and a willingness to label the condition. But after Wakefie ...

A Critical Choice ■ 29 Did scientific conclusions logically follow from analysis of the experimental results to support, or fail ...

30 ■ CHAPTER 02 Evaluating Scientific Claims SCIENCE a meta-analysis (work combining results from different studies) of five coh ...

A Critical Choice ■ 31 conducted by researchers without a conflict of interest, have shown that the number of vaccines given fro ...

32 ■ CHAPTER 02 Evaluating Scientific Claims SCIENCE The first trials are performed on animals or cell lines. Three phases of cl ...

A Critical Choice ■ 33 No one is vaccinated Sick people are contagious; disease spreads through the population. Some people are ...

In 1999, the United Kingdom began a meningitis vaccination program for children up to the age of 18. Meningitis rates rapidly fe ...

A Critical Choice ■ 35 measles. Sixteen of them were unvaccinated. In 2014, measles cases in the United States hit a 20-year hig ...

36 ■ CHAPTER 02 Evaluating Scientific Claims (^8) For each of the following, select the term that best describes the type of lit ...

A Critical Choice ■ 37 contagious even when an infected person shows no symptoms, and symptoms may not appear until years after ...

Ingredients for Life A dusty box, rediscovered after 50 years, sparks a scientific treasure hunt for the origins of life on Eart ...

39 CELLS 03 CHAPTER CHEMISTRY OF LIFE ...

40 ■ CHAPTER 03 Chemistry of Life CELLS up of positively charged protons and electrically neutral neutrons. A cloud of negativel ...

Ingredients for Life ■ 41 agreed to let Miller work on the project for six months, a year at the most. As it turned out, all Mil ...

42 ■ CHAPTER 03 Chemistry of Life CELLS At a crowded seminar, Miller presented his results. Urey sat in the front row. Colleague ...

Ingredients for Life ■ 43 and replied, “Let me put it this way, Enrico. If God didn’t do it this way, he overlooked a good bet!” ...

44 ■ CHAPTER 03 Chemistry of Life CELLS The World of Water The major difference between the two exper- iments was steam—hot wate ...

Ingredients for Life ■ 45 table salt, sodium chloride (NaCl), is composed of sodium and chlorine held together by ionic bonds. U ...