DOK 6
Study Guide Review
Defining Terms
• 1. Extinct-death of the ENTIRE species
• 2. Adaptation-trait that helps the ENTIRE
population
• 3. Mutation-RANDOM changes in the code of
DNA
• 4. Natural Selection-organisms with helpful
traits survive better in the environment
• 5. Environmental Pressure-a change in
surroundings
Examples of Terms
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6. Extinction-dinosaurs
7. Adaptation-dense bones
8. Mutation-coat color
9. Natural Selection-birds with long beaks
survive better because they can reach worms
that live in tree trunks
• 10. Environmental Pressure-pollution
Evidence for Evolution
• Anatomical Similarities-organisms that have
similar skeletons may have come from a
common ancestor
• Radio metric dating-a way to find the actual
age of rocks or fossils (like radio carbon
dating)
• Fossil Record-the record that shows where
organisms were located or their distribution in
the world
Evidence for Evolution, continued
• Developmental Similarities-different
organisms have similar stages during early
development
• Genetic Similarities-similar organisms have
similar DNA and may have come from a
common ancestor
Examples of Evidences of Evolution
• Anatomical Similarity-the arm of a human, the
leg of a cat, the flipper of a whale and the
wing of bat
• Radiometric Dating-radio carbon dating
• Fossil Record-dinosaurs
• Developmental similarity-humans and fish
look similar in the early stages of development
• Genetic Similarity-humans and mice are both
mammals and their DNA is similar
Genetic Variation
• Different gene combinations add to the
diversity of a population
• Example-dog breeds
Favorable Trait
• A trait that is beneficial to a population in
some way. This trait will likely be chosen by
natural selection to become a common trait in
the population because it strengthens the
organism. The organism will survive over its
competitors.
• Example: big beaks during a drought that can
pick up big seeds when little ones are not
available
Graph
• 25. True
• 26. The prey population increases and
supports the predator need for food.
• 27. True
• 28. The predator population decreases and
the prey population is able to reproduce and
thrive in the environment.
Diagram
• 29. True
• 30. C. The environment was once an ocean
filled with fish and became a forest filled with
dinosaurs.
Paragraph
• First, there is a group of organisms. In a few of the organisms, their
DNA is mutated. In their current environment, they are all able to
thrive, so their different traits show up in the population as genetic
variation. For example, there were 8 varieties of Jellybellicus
organisms and their populations were equal at the beginning of the
lab. If an environmental pressure (such as pollution, a predator, a
weather event) occurs, then some of those traits might give an
organism an advantage. If an organism has an advantage, it gets to
live and make some babies. If an organism does not have a
favorable (helpful) trait, it dies. That process is called natural
selection. Over time, if natural selection takes place for many
generations, the entire population might end up with that favorable
trait. If that happens, the trait is called an adaptation. In our
Jellybellicus lab, after several generations, we ended up with 3
possible adaptations: camouflage, mimicry, and poisonous traits.