Study the chart that explains the process archaeologists follow when excavating for evidence of how early hominids lived. Which of the following is the missing step? A Geologists examine seeds and animal bones at the site B Archaeologists record the description and location of each artifact C Botanists analyze blood stains found on artifacts D Zoologists determine the age of the rocks surrounding the dig

A student in an exercise science program wishes to study dietary habits of married couples. She surveys married couples from her local gym and asks them (individually) what percent of their daily calories are from fat. She analyzes the results using the Wilcoxon signed-ranks test. Explain why her results are questionable.

When transgenic organisms are made, the transgene may integrate into multiple sites within the genome. Furthermore, the integration site may influence the expression of the gene. For example, if a transgene integrates into a heterochromatic (i.e., highly condensed) region of a chromosome, the transgene may not be expressed. For these reasons, it is important for geneticists to analyze transgenic organisms with regard to the number of transgene insertions and the expression levels of the transgenes. Describes three methods (Southern blotting, Northern blotting, and Western blotting) that can be used to detect genes and gene products. Which of these techniques would you use to determine the number of transgenes in a transgenic plant or animal? Why is it important to know the number of transgenes? (Hint: You may want to use a transgenic animal or plant as breeding stock to produce many more transgenic animals or plants.) Which technique would you use to determine the expression levels of transgenes?

As part of a science project, you study traffic patterns in your city at an intersection in the middle of downtown. You set up a device that counts the cars passing through this intersection for a 24-hour period during a weekday. The graph of hourly traffics was discussed earlier.? d. Provide a hypothesis explaining the trend in numbers of cars over the course of the day.

Which of the following statements about osmoregulation is true?

A. In freshwater invertebrates, salts move out of the body into the water because the animal is hypoosmotic to the water.

B. A marine fish has to fight gaining water because it is ismoosmotic to the water.

C. Most land animals are osmoconformers.

D. Vertebrates are usually osmoregulators.

E. Terrestrial animals can regulate their osmolarity without expending energy.

Mr. Alim's science class launched a toy rocket from ground level with an initial upward velocity of 60 feet per second. The height $h$ of the rocket in feet above the ground after $t$ seconds is modeled by the equation $h=60 t-16 t^2$. How long was the rocket in the air before it returned to the ground?

When the anthropologist Archie Phinney recorded his people's animal stories in writing, he found that their spirit had been lost. He said, "When I read my stories mechanically I find only the cold corpse." View the video of storyteller Terry Tafoya's performance of "Coyote's Eyes." What would be lost if the performance were transferred on to the printed page?

The following exercise involves distinguishable permutations.

A group of thirty students is taking a field trip to a science museum. Three vans are available for transporting the students. The first van has room for eight students, and the other two vans each have room for eleven students. In how many different ways can the students be assigned to the vans?

An animal shelter has 200 calendars to sell at a fair as a fundraiser. Each of the calendars costs $3 to make. The shelter hopes to sell all the calendars and make a total profit of$1800. a. What should the selling price of each calendar be? b. If the shelter hopes to make a profit of $2000, what should the selling price of each calendar be? Explain your reasoning.

A rabbit can run 35 miles per hour. A fox can run 21 miles in half an hour. Which animal is faster, and by how much? (A) The rabbit is faster by 7 miles per hour. (B) The fox is faster by 7 miles per hour. (C) The rabbit is faster by 14 miles per hour. (D) The fox is faster by 14 miles per hour.

U.S. Population The Museum of Science in Boston displays a running total of the U.S. population. On May $11, 1993.$ the toxal was increasing at the rate of $1$ person every $14$ sec. The displayed population figure at $3:45$ P.M. that day was $257,313,431$. Assume that the relative growth rate is constant.
What is the relative growth rate per year ( $365$ days)?

A parody is an imitation (usually intended to be humorous) of a literary or artistic work. Write one or two stanzas of a parody of "The Raven." You might use another bird or animal in place of the raven, change the reason for the speaker's sorrow, or invent a new message for the intruder to utter. Whatever you change, try to follow Poe's meter and rhyme schemes so that your parody will be recognizable.

The fracture strength of a certain type of manufactured glass is normally distributed with a mean of 579 MPa with a standard deviation of 14 MPa.

(a) What is the probability that a randomly chosen sample of glass will break at less than 579 MPa?

(b) More than 590 MPa?

(c) Less than 600 MPa? (Data are from Science 283 [February 26, 1999], p. 1296.)

A science museum has a display called a sewer pipe symphony. It consists of many plastic pipes of various lengths, which are open on both ends. (a) If the pipes have lengths of $3.0 \mathrm{~m}, 2.5 \mathrm{~m}$, $2.0 \mathrm{~m}, 1.5 \mathrm{~m}$ and $1.0 \mathrm{~m}$, what frequencies will be heard by a visitor's ear placed near the ends of the pipes?