Evolution is...
A change in an organism over a long period of time.
There are two main theories of how evolution occurred. One by Jean Baptiste Lamarck called “Inheritance of Acquired Characteristics” and the other by Charles Darwin called “Descent with Modification”.
Lamarck’s theory was also known as “The Theory of Use-Disuse”. He thought that the qualities you acquired over your life time would be passed down to your. His theory was not true but he changed the way people were thinking of evolution.
Darwin was studying the different types of finches in the Galapagos Islands when he came across the idea of Natural Selection. Natural Selection is the process where organisms better adapted to their environment tend to survive and produce more offspring also known as survival of the fittest.
There are two main theories of how evolution occurred. One by Jean Baptiste Lamarck called “Inheritance of Acquired Characteristics” and the other by Charles Darwin called “Descent with Modification”.
Lamarck’s theory was also known as “The Theory of Use-Disuse”. He thought that the qualities you acquired over your life time would be passed down to your. His theory was not true but he changed the way people were thinking of evolution.
Darwin was studying the different types of finches in the Galapagos Islands when he came across the idea of Natural Selection. Natural Selection is the process where organisms better adapted to their environment tend to survive and produce more offspring also known as survival of the fittest.
Is Evolution True...
I think evolution is true because scientists have found many ways to prove it. There are four main ways they have found that prove the theory of evolution. The four studies of evolution are:
1. Fossils- comparing homologous structures in fossils to species alive today.
2. Comparative anatomy- comparing homologous structures from different species, not just bones.
3. Comparative embryology- embryos express the primitive genes first. This is the comparison of those embryo.
4. Molecular evidence- comparing the DNA from different species and finding the similarities and differences. Using molecular clocks they can tell approximately how long the gene pools have been separated.
1. Fossils- comparing homologous structures in fossils to species alive today.
2. Comparative anatomy- comparing homologous structures from different species, not just bones.
3. Comparative embryology- embryos express the primitive genes first. This is the comparison of those embryo.
4. Molecular evidence- comparing the DNA from different species and finding the similarities and differences. Using molecular clocks they can tell approximately how long the gene pools have been separated.
Gradualism vs Punctuated Equilibrium...
Gradualism- Species descended from a common ancestor gradually diverge more and more as they acquire unique adaptations.(on the left)
Punctuation Equilibrium- A new species changes most as it buds from a parent species and then changes little for the rest of its existence.(on the right)
Punctuation Equilibrium- A new species changes most as it buds from a parent species and then changes little for the rest of its existence.(on the right)
Change in gene pool...
1. Natural Selection: Those best suited to the environment will survive and pass on their "fit" genes to the next generation.
2. Mutations: A random change in the DNA of an organism. Can be good, bad or neutral.
3. Genetic Drift: A change in the gene pool as a result of a random event.
4. Gene Flow: The transfer of genes from one population to another.
5. Non-Random Mating: Organisms chose the best suited mate.
2. Mutations: A random change in the DNA of an organism. Can be good, bad or neutral.
3. Genetic Drift: A change in the gene pool as a result of a random event.
4. Gene Flow: The transfer of genes from one population to another.
5. Non-Random Mating: Organisms chose the best suited mate.
My Dichotomous Key...
1. a) It has wings...................go to 2
b) No wings.......................go to 6
2. a) Double wings.................go to 3
b) Sing wings....................go to 4
3. a) Antennae......................Butterfly
b) No Antennae.................Dragonfly
4. a) 6 legs...........................go to 5
b) Less legs......................Bat
5. a) Big Antennae................Cockroach
b)Small Antennae..............Fly
6. a) Legs.............................go to 7
b) No Legs........................go to 10
7. a) 6 Legs...........................Ant
b) More Than 6..................go to 8
8. a) 8 Legs...........................go to 9
b) More Than 8 Legs..........Centipede
9. a) Hairy.............................Tarantula
b) Slick.............................Black Widow
10.a) Has scales.....................Snake
b) No Scales.....................go to 11
11.a) Has a Shell.....................Snail
b) No Shell.........................Earthworm
b) No wings.......................go to 6
2. a) Double wings.................go to 3
b) Sing wings....................go to 4
3. a) Antennae......................Butterfly
b) No Antennae.................Dragonfly
4. a) 6 legs...........................go to 5
b) Less legs......................Bat
5. a) Big Antennae................Cockroach
b)Small Antennae..............Fly
6. a) Legs.............................go to 7
b) No Legs........................go to 10
7. a) 6 Legs...........................Ant
b) More Than 6..................go to 8
8. a) 8 Legs...........................go to 9
b) More Than 8 Legs..........Centipede
9. a) Hairy.............................Tarantula
b) Slick.............................Black Widow
10.a) Has scales.....................Snake
b) No Scales.....................go to 11
11.a) Has a Shell.....................Snail
b) No Shell.........................Earthworm