Exam 1: Learning About Life

Which structure can perform all the activities required for life?

What does "adaptation" mean in an evolutionary context?

In the process of evolution by natural selection illustrated in this figure, what is the mechanism or agent of natural selection?

Scenario Kenneth and Catherine Lohmann of the University of North Carolina explored the orientation or direction-finding abilities of loggerhead sea turtle hatchlings under varying magnetic conditions. Hatchlings were placed in a tank of water in a laboratory either in the natural magnetic field of the earth OR in a reversed magnetic field in which north and south were flipped. The researchers then measured the direction that the hatchlings swam. The experiments were carried out in the dark and at night since that is when most newly hatched turtles migrate from their sandy nests into the ocean. -What is the variable being tested in this experiment?

Scenario Kenneth and Catherine Lohmann of the University of North Carolina explored the orientation or direction-finding abilities of loggerhead sea turtle hatchlings under varying magnetic conditions. Hatchlings were placed in a tank of water in a laboratory either in the natural magnetic field of the earth OR in a reversed magnetic field in which north and south were flipped. The researchers then measured the direction that the hatchlings swam. The experiments were carried out in the dark and at night since that is when most newly hatched turtles migrate from their sandy nests into the ocean. -The results of the Lohmanns' experiments are most likely to be considered credible if

What is biology?

Which information flow is disrupted when diabetes destroys insulin-producing cells?

What are genes composed of?

Which statement is a valid scientific hypothesis?

The phrase "Most ecosystems are solar powered" refers to the fact that

Which properties of life are possessed by viruses and green turtles?

Suppose a scientist wanted to determine if a substance retrieved from outer space alive. Which of these properties of the substance would NOT help her make that determination?

What are the two main processes upon which ecosystems depend?

Which concept was proposed by Darwin?

Which results should occur if climate change leads to increased warming global temperatures?

Scenario Kenneth and Catherine Lohmann of the University of North Carolina explored the orientation or direction-finding abilities of loggerhead sea turtle hatchlings under varying magnetic conditions. Hatchlings were placed in a tank of water in a laboratory either in the natural magnetic field of the earth OR in a reversed magnetic field in which north and south were flipped. The researchers then measured the direction that the hatchlings swam. The experiments were carried out in the dark and at night since that is when most newly hatched turtles migrate from their sandy nests into the ocean. -In determining factors that influence sea turtle migration, the exploration phase might include

You try to start your car, but it does not start. Which of these is a prediction?

A study may be pseudoscience if

What is a gene?

Scenario The collared lizard is a species found in the Desert Southwest. Male collared lizards show considerable color variation, ranging from brightly colored to a very dull pattern. Your goal is to determine the function, if any, of male color patterns in collared lizards, using the scientific method. Your tentative explanation is that male color plays a role in attracting females for mating purposes. You predict that females will preferentially choose brightly colored males over dull-colored ones. To test your prediction, you observed the interactions of female collared lizards with their male counterparts. You selected males that were the same age and size, and that differed only in their coloration pattern. You placed equal numbers of the two types of male lizards, bright and dull, in aquariums, along with one female lizard per aquarium. Out of 350 aquariums observed, the female chose to mate with the brightly colored male 277 times, and the dull-colored male 70 times. In three instances, the females did not mate with either type. Create a bar graph of your data, plotting the type of male (dull-or brightly colored) on the x-axis. On the y-axis, plot the frequency with which each type of male was chosen by females. Using this graph -Do the data support the conclusion that female collared lizards prefer more brightly colored male lizards over dull-colored males?