BIO101 Unit 1

Which of the following lists the steps of the process of science in correct order? Observation, communication, outcomes, and testing Observation, communications, testing, and outcomes Observation, testing, communication, and outcomes Any of the above are correct.

Any of the above are correct

Can you identify the steps in the scientific method that correspond to Hunt's experiments? Drag each statement under the step in the scientific method that it demonstrates.

Observation: The eggs of mice in plastic cages washed with harsh soaps displayed problems during cell division that caused genetic abnormalities. Question: Could bisphenol A form the plastic be affecting the mice in the damaged cages? Hypothesis: The frequency of genetic abnormalities in mice is affected by exposure to bisphenol A. Prediction: If mice are exposed to elevated levels of bisphenol A, the frequency of genetic abnormalities in these mice increase

Properties of all living things

Reproduces its own kind Responds to the environment Complex, but well-ordered, structure Populations evolve over time Takes in, converts, and expels energy

Not properties of all living things

Requires another individual to reproduce Eats other organisms to gain energy Individuals evolve over time Composed of many cells

You see a display for a new diet pill in a grocery store. The display includes a stack of color-printed handouts claiming the average user of the product loses five pounds per week while taking the product. Which of the following would indicate that the handout is not a reliable source?

The intent of the handout is to convince the consumer to buy the diet pills

Which of the following features would be useful in identifying pseudoscience?

beliefs

By definition, a theory

is supported by a large body of evidence.

Can you sequence the following levels of biological organization from smallest to largest?

molecule cell tissue organ organism population community ecosystem biosphere

Each spring, high school students, college interns, and retirees count and weigh tiny glass eels in streams that feed into the Hudson River. They report their observations to the New York State Department of Environmental Conservation Hudson River Estuary Program and the National Estuarine Research Reserve System, who depend on volunteers to help build a database of information about glass eels. The observations that these volunteers make would best be described as __________.

observational studies

Drag type of experiment on the left to the example of experiment on the right.

Blood concentrations of BPA in college students are compared to their recent consumption of canned food items: Natural The feeding behavior of fish in streams that receive acidic runoff from strip mines is compared to the feeding behavior of fish in unaffected streams: Natural The deformity rate in baby birds from nests in pesticide-sprayed fields is compared to the deformity rate in birds from nests in unsprayed fields: Natural Tumor development is compared in mice exposed to five dosages of a known carcinogen in the laboratory: Manipulative Foraging activity levels are compared in tadpoles exposed to four concentrations of toxic metals in the laboratory: Manipulative Growth of corn plants is compared in field plots sprayed with three different dosages of weed killer: Manipulative BPA concentrations in the urine of people with diabetes are compared to BPA concentrations in the urine of people without diabetes: Natural

Hunt and her team designed an experiment to test her hypothesis about the effect of BPA on mice. They administered daily doses of BPA to groups of female mice over three, five, or seven days and then tested these mice for genetic abnormalities that occur during meiosis, the division of chromosomes during egg formation. Drag the labels to identify the components of Hunt's experiment. Labels may be used once, more than once, or not at all.

Dosage 0 ng/g BPA: control Dosage 20 ng/g BPA: treatment Dosage 40 ng/g BPA: treatment Dosage 100 ng/g BPA: treatment Dosage of BPA administered is: independent variable Length of time over which mice were exposed to BPA is a(n): independent variable The percentage of mice displaying genetic abnormalities is a(n): dependent variable

1. The type of test that changes only one variable at a time in order to isolate the results is known as a _______ experiment. 2. The one variable that is manipulated by a scientist as a potential cause in an experiment is the ________variable. 3. The _______variable is the factor a scientist observes to see the effect of the change made. 4. A ________establishes a base line for an experiment. 5. A _______ is a group in which no response is expected. 6. A _______ is a group in which a known response is expected. 7. In a ________ experiment, the researchers--but not the participants--know who receives the treatment and who does not, to eliminate subjective bias. 8. In a _______ experiment, neither the participants nor the researchers know who receives the treatment and who does not.

controlled independent dependent control group negative control positive control single-blind double-blind