Chapter 4 Review
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Hat evidence of natural selection is available today that was not available to Darwin?
Differences in genes create variation
What process often begins with a portion of the population being isolated?
Speciation
What is the process in which individuals survive and reproduce better than others because they are more adapted?
Natural selection
A form of hereditary characteristic is called a
Trait
Insects can adapt to insecticides quickly because
Their generation time is short
What process would farmers use to produce vegetables that will grow in a specific climate?
Selective Breeding
Genes make organisms more likely to survive and reproduce. What process can occur?
Selection//adaptation
If two organisms have similar traits and DNA, they probably
Share a common ancestor
How did the Galapagos finches differ from the finches on other islands?
Different beaks - adapted to their environment
Which was not a source of Darwin's ideas about natural selection? Scientific discoveries about DNA Selective breeding by farmers Writing of Mathis and Lyell Observation of finches
Scientific discoveries about DNA
A spider will produce hundreds of eggs, only a few survive. This is an example of
Overproduction
The remains or imprints of a once-living organism found in layers of rock is a
Fossil
Populations are limited by
Starvation, disease, competition, and predation (being killed by predators)
What is not an example of natural section?
Dog owner breeding their pets to produce better offspring
What can fossils reveal about organisms in an environment
How they adapted to their environment
Wide and strong beak = what food source?
Hard, big seeds
Male frogs croak to scare predators. Why are the louder ones more likely to survive?
They will be able to scare off predators better.
Darwin observed variations in individuals. What is the cause?
Differences in genes
What information about organisms in an environment can the fossil record provide?
How organisms in the environment change over time.
Darwin concluded that the finches changed. What traits did Darwin base his thoughts on?
The beak size and shape of the finches
Why are tarantulas that have more hair more likely to produce offspring ?
Better to defend themselves//better to attract mates