Midterm Review 1

All organisms have the same:

• Cell organelles

• Types of proteins needed for life

• Division of the nucleus

• DNA bases

The fact that a strain of yeast with a certain defective gene can use the human version of the gene to repair itself is evidence that yeast and humans:

• Depend on the same food supply

• Share a genetic code

• Both are eukaryotic cells

• Have identical genomes

Which is NOT TRUE about evolution?

• It happens over generations

• It has to do with heritable traits

• It can happen instantly

• It happens within populations

Organisms with desirable traits are more likely to survive than those with undesirable traits. Why?

• they have a higher gene frequency in the population

• they have undergone more mutations

• they are more fit for the environment

True or False: homologous structures provide evidence of common ancestry

• True

• False

What does it mean when a species becomes extinct?

• the population rapidly grows

• the population decreases to 0

Which of these does not support the theory of evolution?

• fossil record

• DNA comparisons

• food webs

Why does creating more offspring increase the fitness of a species?

• it increases competition for resources

• it increases gene flow

• it increases the chance that some of the offspring will survive and reproduce

• creating more offspring does not make a species more fit

A rabbit population has increased their average speed over time allowing them to outrun their predators. How did this happen?

• they "decided" to become fast

• faster rabbits were able to survive and reproduce, increasing the frequency of their genes in the population

• the slow rabbits mutated

Which organism is least related to all the other organisms?

• Organism 1

• Organism 2

• Organism 3

• Organism 4

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