SKIMMING AND SCANNING
1. Read the following questions. Then skim and scan Section 14.2 on pages 330333 to find the answers.
a.What did Russian biologist Dmitri Ivanovsky conclude tobacco mosaic disease?
b.Why is classifying viruses so difficult?
c.How many virus shapes are shown in Figure 14.6?
d.What is a retrovirus?
e.What is a prion?
2. Read the following statements. Then skim and scan Section 14.3 on pages 334335 to find out if each statement is true or false.
a. Measles, chicken pox, and mumps are viral diseases that infect humans.
b. The polio vaccine was developed in the 1970s.
c. Anmals and plants are susceptible to viruses.
d. Viral diseases can be cured by antibiotics and other medicines.
e. Some viruses are being used to control pests that harm food crops.
3. Skim and scan Section 14.6 on pages 344346 to locate the following details. Then tell where in the text you found each detail.
a. Scientific proof that bacteria could be used to remove oil from contaminated beaches came in 1989, when the Exxon Valdez spilled oil in Alaska.
b. Bacteria are used in the process of making cheese.
c. Symbiosis is the relationship involving direct contact between two organisms in which at least one of the partners benefits.
d. Robert Koch was the first to connect diseases with specific bacteria.
e. E. coli has been genetically engineered to produce human insulin.
4. Read the following incomplete statements. Then skim and Section 15.1 on pages 352354 to find the information you need to complete each statement.
a. Kelp beds provide
b. The only characteristic common to all protists is that
c. The first eukaryotes evolved
d. When you are hiking, don't drink the water you find in streams because
e. The diversity of protists reflects several significant evolutionary developments, including variety in
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Reading Strategy 4.1 || Worksheet 4.1
Reading Strategy 4.2 || Worksheet 4.2
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