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Problem 1
Anton van Leeuwenhoek made an important contribution to the development of the cell theory. How?
a. He articulated that all organisms are made of cells.
b. He articulated that all cells come from preexisting cells.
c. He invented the first microscope and saw the first cell.
d. He invented more powerful microscopes and was the first to describe the diversity of cells.
Problem 2
What does it mean to say that experimental conditions are controlled? Select True or False for each statement.
T/F The test groups consist of the same individuals.
T/F The null hypothesis is correct.
T/F There is no difference in outcome between the control and experimental treatment.
T/F All physical conditions except for one are identical for all groups tested.
Problem 3
What does it mean to say that a characteristic is heritable?
a. The characteristic evolves.
b. The characteristic can be passed on to offspring.
c. The characteristic is advantageous to the organism.
d. The characteristic does not vary in the population.
Problem 4
Could both the food competition hypothesis and the sexual competition hypothesis explain why giraffes have long necks? Why or why not?
Problem 5
What would researchers have to demonstrate to convince you that they had discovered life on another planet?
Problem 6
What did Linnaeus' system of naming organisms ensure?
a. Two different organisms never end up with the same genus and species name.
b. Two different organisms have the same genus and species name if they are closely related.
c. The genus name is different for closely related species.
d. The species name is the same for each organism in a genus.
Problem 7
What is 'selected' during natural selection? Explain your answer.
Problem 8
Explain why researchers formulate a null hypothesis in addition to a hypothesis when designing an experimental study.
Problem 9
A friend tells you that the theory of evolution is just an educated guess by biologists about how things work. Evaluate this statement.
- A friend tells you that the theory of evolution is just an educated guess by biologists about how things work. Evaluate this statement.
Problem 9
Problem 10
Some humans have genes that make them resistant to infection by HIV. Would human populations likely evolve differently in areas of the world where HIV infection rates are high? Explain your logic.