Exam 1: Introduction: Biology Today

The DNA of a eukaryotic cell is found within the ________.

A newly discovered multicellular organism obtains food by digesting dead organisms.Such an organism is most likely a member of the kingdom ________.

What are the two main processes upon which ecosystems depend?

The branch of biology that explains both the diversity and the unity of life is ________.

Which of these statements is CORRECT?

Antibiotic resistance evolves in bacteria when ________.

Humans are composed of ________ cells.

More than half of all known species are ________.

Science is ________.

What accounts for the different breeds of domesticated dogs?

A hypothesis is a(n)________.

The human genome consists of about ________ chemical letters.

Which of these is most closely associated with Darwin?

How do hypotheses differ from theories?

Using the branching tree of life for bears depicted in the accompanying figure,choose from among the following bear species the one that is most distantly related to the sun bear.

Scenario Questions Please use the following information to answer the following question(s). 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, answer the following questions. -"Male collared lizards show considerable color variation." This is a(n)________.

Scenario Questions Please use the following information to answer the following question(s). 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, answer the following questions. -Dull-colored males were used in this experiment to ________.

Taxonomy is the ________.

What is biology?

What does "adaptation" mean in an evolutionary context?