when we collect fish or mussels we record a variety of biological information, including but not limited their sex, length, weight or a scale or finray or other tissue sample. Why do we do this, and what information are we hoping to obtain from these measurements and taking these samples?

Figure 1.15 Example of error bars in a graph. This graph was adapted from the peacock butterfly research described in Section 1.5. The researchers recorded the number of times each butterfly flicked its wings in response to an attack by a bird. The squares represent average frequency of wing flicking for each sample set of butterflies. The error bars that extend above and below the dots indicate the range of valuesthe sampling error. Figure It Out: What was the fastest rate at which a butterfly with no spots or sound flicked its wings?

Which of the following is a Monotreme? a. kangaroo b. koala c. bandicoot d. platypus

Figure 1.6 In the example below, the scientific method is used to solve an everyday problem. Order the scientific method steps (numbered items) with the process of solving the everyday problem (lettered items). Based on the results of the experiment, is the hypothesis correct? If it is incorrect, propose some alternative hypotheses. Observation Question Hypothesis (answer) Prediction Experiment Result There is something wrong with the electrical outlet. If something is wrong with the outlet, my coffeemaker also won’t work when plugged into it. My toaster doesn’t toast my bread. I plug my coffee maker into the outlet. My coffeemaker works. Why doesn't my toaster work?

Figure 28.21 Which of the following statements about the anatomy of a mollusk is false? Mollusks have a radula for grinding food. A digestive gland is connected to the stomach. The tissue beneath the shell is called the mantle. The digestive system includes a gizzard, a stomach, a digestive gland, and the intestine.

Which of the following is not a feature common to most animals? a. development into a fixed body plan b. asexual reproduction c. specialized tissues d. heterotrophic nutrient sourcing

What do scientists in the field of systematics accomplish? a. discover new fossil sites b. organize and classify organisms c. name new species d. communicate between field biologists

In 2005, researcher Woo-suk Hwang reported that he had made immortal stem cells from human patients. His research was hailed as a breakthrough for people affected by degenerative diseases, because stem cells may be used to repair a persons own damaged tissues. Hwang published his results in a peer-reviewed journal. In 2006, the journal retracted his paper after other scientists discovered that Hwangs group had faked their data. Does the incident show that results of scientific studies cannot be trusted? Or does it confirm the usefulness of a scientific approach, because other scientists discovered and exposed the fraud?

Why would you think twice about ordering from a restaurant menu that lists only the second part of the species name (not the genus) of its offerings? Hint: Look up Ursus americanus, Ceanothus americanus, Bufo americanus, Homarus americanus, Lepus americanus, and Nicrophorus americanus.

Figure 27.6 Which of the following statements is false? Eumetazoans have specialized tissues and parazoans don’t. Lophotrochozoa and Ecdysozoa are both Bilataria. Acoela and Cnidaria both possess radial symmetry. Arthropods are more closely related to nematodes than they are to annelids.