Evolution Review: Word Search Name: ______
Use the words in the word bank below to fill in the following paragraph. Words will only be used once.
¯ finches
¯ adaptation
¯ absolute
¯ On the Origin of Species
¯ relative
¯ fossils
¯ evolution
¯ evidence
¯ Darwin
¯ natural selection
¯ mimicry
¯ warning coloration
¯ survival of the fittest
¯ camouflage
¯ half life
______is the gradual process of modern organisms descending from ancient ancestors. There are many pieces of ______to support this theory. The first piece is ______, which are the stone remains of ancient organisms. There are two ways to date fossils. The first, ______dating, compares layers formed in sedimentary rocks to figure out the age of the fossils found within them. Index fossils help paleontologists to date a layer of rock to a specific period in time. ______dating is a more precise way to date fossils. This type of dating looks at how radioactive elements decay over time. Scientists use the elements ______to calculate how old a fossil is.
______was a naturalist in the mid-19th century who came up with a valid theory on how evolution might occur. He published his ideas in a book titles ______. This process, called ______, states that individuals in a population who are most fit to their environment, live and produce more offspring. Those who are unfit for their environment die or leave few offspring. Over time, ______will leave the most fit organisms in that environment to produce offspring. Darwin saw that various species of ______on the Galapagos Islands had beaks adapted to their diet and environment. He concluded that they were most fit for their environment and other finches with different beaks had died out.
Any alteration in structure by a species through heredity that improves its condition is called an ______. ______is an adaptation that allows an organism to blend into their environment, hiding from its predators. Some organisms have ______, which its predators detect as being a danger. It could mean the organism is poisonous, or used to startle the predator. Finally, some organisms use ______to look like a poisonous relative, even though they are not themselves poisonous.
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Define Natural Selection:
Define Darwin’s 8 principles that led to his idea of natural selection.
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