Download Key Question answers

PERIOD 1: KEY QUESTION RESPONSES
1. Darwin’s observations
 Finches were different
 Each island’s organisms were a little different / had variations
 Witnessed natural disasters (volcanos, earthquakes)
 Used his observations to create theory of evolution
2. Darwin’s thoughts on the differences between species
 All adapted differently
 Environmental changes and genetic variations that caused changes
 Their differences helped them to survive in their different
habitats/locations/environments
 Finches – different beaks for different food supplies
3. Natural Selection
overproduction
variation
competition
selection
survive & reproduce
making too many babies
small changes between organisms
food, shelter, water, mates
only the well adapted organisms live
allows them to pass on their good traits
through their genes
4. Natural Selection  Evolution
 NS over and over, the organism changes, leading to evolution
 Over many generations & lots of time
5. How do genes related to evolution?
 We pass down our good traits, which are made of GENES
6. Examples of adaptations
 Physical: gliding frogs
 Chemical: skunk odor
 Behavioral: mating
PERIOD 2 - KEY QUESTION RESPONSES
1. Darwin’s observations
 Variation & specific characteristics between species on different islands
 Remains of extinct organisms
 Plant life
 Earthquakes, volcanos
2. Darwin’s thoughts on the differences between species
 Organisms slowly changed in order to adapt to their environment
3. Natural Selection
overproduction
variation
competition
selection
Survive & reproduce
Organisms have lots of babies
Each baby is a little different
(genes/alleles)
Food, space, water, mates
The best will survive / survival of the
fittest
Pass on their traits/genes to their offspring
4. Natural Selection  Evolution
 Those that survive continue to change a little more, and natural selection continues
 Natural selection over many generations leads to big changes, which is evolution
 Long, slow process
5. How do genes related to evolution?
 Only info on genes can be passed down through natural selection, leading to evolution
6. Examples of adaptations
 Physical – mimicry
 Behavioral – mating
 Chemical – odor
PERIOD 4: KEY QUESTION RESPONSES
1. Darwin’s observations
 Found different types of birds – each had a different beak depending on which island it
lived on
 Collected lots of materials and used it to develop his theory of evolution
 Saw fossils of extinct organisms
 Experienced volcanos and earthquakes
2. Darwin’s thoughts on the differences between species
 They changed over time depending on their environment (food, predators, etc…)
3. Natural Selection
overproduction
variation
compete
selection
Survive & reproduce
Having lots of babies; not all live
Each baby is a little different; because of
DNA/Genes
Mates, food, water, space/shelter
Only some survive; survival of the fittest
Pass on their traits (DNA/genes) to babies
4. Natural Selection  Evolution
 Only the best adaptations will be passed on to offspring and over many generations we
see change in the species
 Happens slowly over many generations
5. How do genes related to evolution?
 Only traits controlled by genes can be passed on to offspring
6. Examples of adaptations
 Physical – fur, claws
 Chemical – skunk spray, poison
 Behavioral – mating, hunting, red chest bird! 
PERIOD 5: KEY QUESTION RESPONSES
1. Darwin’s observations
 Plants and animals that were new to him
 Different adaptations among animals (birds had different beaks)
 Fossils of ancient/extinct organisms
 Collected many samples of materials from the Galapagos…studied them at home
 Experienced an earthquake and volcanos
 Coral growing up out of the ocean…thought that the land was shifting up
2. Darwin’s thoughts on the differences between species
 Many differences were because of the different foods the organisms ate (beaks)
 The environment led to differences (iguanas)
3. Natural Selection
overproduction
variation
competition
selection
Survive & reproduce
More babies born that can survive
Each baby will be a little different bc of
their GENES/DNA
Food, space, mates, water
Some will be better suited for their
environment (survival of the fittest)
Allows well suited organisms to pass on
their DNA to offspring
4. Natural Selection  Evolution
 These little changes lead to bigger changes
 The best organisms survive, reproduce and this leads to more well adapted organisms
 Very slow…depends on life cycle time
5. How do genes related to evolution?
 w/o genetic variation, all species would have the same chance of survival or death
 individuals of the same species can change over time differently bc of their different
variations
6. Examples of adaptations
 Physical – thumb
 Chemical – stink bug
 Behavioral – bullet ants took the sick ant away from colony
PERIOD 6: KEY QUESTION RESPONSES
1. Darwin’s observations
 Diversity of organisms around the world
 Remains of ancient/extinct organisms
 Animals were different from each other between islands on the Galapagos
 Animals appeared to change over time (giant fossils vs. regular sized living organisms)
2. Darwin’s thoughts on the differences between species
 The organisms changed over many generations and became better suited to their
environment
 Differences in organisms were the result of their environment (food)
3. Natural Selection
overproduction
variation
competition
selection
Survive & reproduce
Have more babies than needed or will
survive
Each baby is a little different bc of
GENES/DNA
Food, shelter, water, mates
Survival of the fittest
Pass on our good traits via our DNA/genes
4. Natural Selection  Evolution
 Offspring are all different and over time that leads to a big change (evolution)
 Helpful traits will gradually become more common in a population (evolution)
5. How do genes related to evolution?
 Evolution is only controlled by genes!
6. Examples of adaptations
 Physical – wings to fly; thumbs, camo, beaks
 Behavioral – mating, hunting
 Chemical – poison, odor