Watch this prezi to see the organisms of the world
What is Evolution?
Evolution is change over time. This is how organisms evolve into the organism they are today. Why do whales swim? Why do sharks have sharp teeth? All of these questions are answered in the sections below:
Evolution is change over time. This is how organisms evolve into the organism they are today. Why do whales swim? Why do sharks have sharp teeth? All of these questions are answered in the sections below:
Mutation:
A mutation is a change in gene, or in other words when one gene is different and shouldn't be there. The only way for a new allele to be created is through mutation. A mutation can either be harmful or helpful. For example, a change in color of one animal might help it camouflage in their habitat, but for another animal, it may make it more noticeable to prey in their habitat
A mutation is a change in gene, or in other words when one gene is different and shouldn't be there. The only way for a new allele to be created is through mutation. A mutation can either be harmful or helpful. For example, a change in color of one animal might help it camouflage in their habitat, but for another animal, it may make it more noticeable to prey in their habitat
Genetic Drift:
Genetic drift is a change in allele frequency. There are two examples of this: The Founder effect and The Bottleneck effect. In the founder effect a few organisms from a certain envoirment were put into a whole new enviorment and forced to adapt. The Bottleneck effect is when many animals were killed by accident, and the few that survived, kept reproducing.
Genetic drift is a change in allele frequency. There are two examples of this: The Founder effect and The Bottleneck effect. In the founder effect a few organisms from a certain envoirment were put into a whole new enviorment and forced to adapt. The Bottleneck effect is when many animals were killed by accident, and the few that survived, kept reproducing.
Migration:
Migration is when a group of animals move to a new environment to satisfy their needs. They normally travel in groups with their species and go to the same place when the seasons change.
Migration is when a group of animals move to a new environment to satisfy their needs. They normally travel in groups with their species and go to the same place when the seasons change.
Natural Selection:
Natural selection is all about which trait is the best. This is called survival of the fittest. For example if you look at the diagram to the right the most beneficial trait was dogs with long hair. Therefore, the ones with long hair kept reproducing.
There are three types of Natural selection:
1) Stabilizing selecting- This is when the environment supports the medium, for example supporting medium claws
2) Directional Selection-This is when the environment supports one extreme, for example supporting long claws
3) Disruptive Selection- This is when the environment supports both extemes, for example supporting black and white moths
Natural selection is all about which trait is the best. This is called survival of the fittest. For example if you look at the diagram to the right the most beneficial trait was dogs with long hair. Therefore, the ones with long hair kept reproducing.
There are three types of Natural selection:
1) Stabilizing selecting- This is when the environment supports the medium, for example supporting medium claws
2) Directional Selection-This is when the environment supports one extreme, for example supporting long claws
3) Disruptive Selection- This is when the environment supports both extemes, for example supporting black and white moths
Evidence of Evolution:
1)Fossil reccord
2) Geography and skills
3) Comparitive anatomy
4) Molecular Biology
5) Field Study
1)Fossil reccord
2) Geography and skills
3) Comparitive anatomy
4) Molecular Biology
5) Field Study
Special adaptations of the Angler Fish:
- The Angler Fish developed a light hanging from their head called a photophore. They developed it to catch prey more easily [1]
-They also have very long sharp teeth that help them eat and catch their prey more efficiently and effectively [2]
- Anglers have an expandable jaw and stomach. They developed this because food is scarce deep down in the sea. [3]
- The Angler Fish developed a light hanging from their head called a photophore. They developed it to catch prey more easily [1]
-They also have very long sharp teeth that help them eat and catch their prey more efficiently and effectively [2]
- Anglers have an expandable jaw and stomach. They developed this because food is scarce deep down in the sea. [3]
Evolution of the Angler Fish:
The oldest known species of fish is the Coelacanth. This fish looks pretty funky and was found 65 years ago, but fossils have been found 350 million years ago. Like, the Angler Fish, the Coelacanth is a bony fish. It has bones in its fins. Another similarity between the Coelacanth and the Angler Fish is that they have the same diet. They live in the deep ocean and, eat large prey, or whatever they can fit into their mouth. The Coelacanth can unhinge its its skull to consume large prey just like the Angler Fish can unhinge its jaw to consume prey twice its size. The Coelacanth most likely evolved into the Angler Fish. Unhinging the jaw was probably more effective than unhinging the skull and so on. [1]
The oldest known species of fish is the Coelacanth. This fish looks pretty funky and was found 65 years ago, but fossils have been found 350 million years ago. Like, the Angler Fish, the Coelacanth is a bony fish. It has bones in its fins. Another similarity between the Coelacanth and the Angler Fish is that they have the same diet. They live in the deep ocean and, eat large prey, or whatever they can fit into their mouth. The Coelacanth can unhinge its its skull to consume large prey just like the Angler Fish can unhinge its jaw to consume prey twice its size. The Coelacanth most likely evolved into the Angler Fish. Unhinging the jaw was probably more effective than unhinging the skull and so on. [1]
Fossils of the Angler Fish:
The Coelacanth: