EVOLUTION

TOXIN ADAPTATIONS

• Example: A jungle frog is eaten by many predators such as snakes. It has a slime coating on the outside that is very poisonous. Therefore it will not be eaten.
• Definition: When a plant or animal is uses toxins to defend its self from predators who might eat it.

Camoflauge Adaptations!!!Camoflauge is when an organism tries to be identical to another pattern so a predator will not feast upon thy. A perfect example of an organism that uses Camoflauge is a snow owl. They have a white coat to blend in with their snowy habitats. In their case they are the predator stalking the prey.

MIMICRY

• Mimicry is just a little different from camoflauge. It is when an organism tries to imitate another organism so that it is not brutally murdered. The best example of mimicry is the Hawk Moth Caterpillar. When threatened it adjusts its body in a way to resemble a snake therefore hawks and birds will stay away.

Stablizing selection is a type of natural selection that decreases the population due to outlying species being unable to survive. For example if there were two types of girraffes, one with a long neck and one with a short neck, and their food was 20 feet high. Which one would survive? Without a doubt the tall girraffe.

DISRUPTIVE SELECTION

• An example distributive selection is a flower that suddenly was no longer pollinated and therefore died off because of its lack of resource. Because of its decline in population, other flowers can thrive from the new pollen

DIRECTIONAL SELECTION

• It is a type of natural selection in which an extreme phenotype is favored over all others.
• If an organism contains an unfavored phenotype it may not survive as well as the other organisms.

Sexual Selection
It is again another type of natural selection. Sexual selection is when one gender of an organism chooses the other gender to mate with. For instance, male Peacocks show off their bright colors to the female so that she is impressed and they can mate.

DIVERGENT EVOLITION

• This is one reason scientists beleive we have evolved from one organism. Divergent evolution is the differences between organisms that can lead to a formation of a new species. For example we humans have very similar bone structures as apes.

CONVERGENT EVOLUTION

• It is when two closely related organisms aquire small traits to adapt to their environment. A doliphin and a shark come from common ancestors but have aquired different traits based on their environments.

COEVOLUTION

• Coevolution is when two organisms that are adapting to their environments evolve together. A perfect example would be a bee to a flower. The two organisms become dependant on each others survival.

THE END!!!!