Organisms that are best adapted to an environment survive and reproduce more than others. Also called survival of the fittest.

- Variation where there is a natural difference in the population
- Isolation where different groups of the same population are prevented from breeding
- Natural selection affects the genotype and causes changes that prevent groups from breeding.

Deoxyribonucleic Acid is made up of molecules called nucleotides that contain a sugar group, phosphate ground and a nitrogen base. The nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C).

Happens when two of more population interbreed this generally increases genetic diversity.

Leftover traces of evolution that serve no purpose

similar anatomy in different types of animals because of a common ancestor

1. Overproduction – each species produces more offspring than can survive
2. Variation - each individual has a unique combination of inherited traits
3. Competition – Individuals compete for limited resources such as food, water, space, mates (not all individuals will survive to adulthood)
4. Selection – individuals with the best traits/ adaptations will survive and have the opportunity to pass the traits onto their offspring. Individuals with the traits not well suited will leave few offspring or die off. This leads to the bad traits being eliminated by the death of the individuals.

single cellular and that have circular DNA

Actual body or body parts of an organism that has been preserved. The hard part of the organism are preserved or the fort parts might also get preserved

The process where organisms that are not closely related independently evolve similar traits as a result of having to adapt to similar environments

fossils are a record of the history of life on Earth

If everyone was the same they would all be vulnerable to the same environmental changes or diseases.

Multicellular and have membrane bound organelles

When a population becomes geographically isolated from the original population such as continental drift.

Each species produces more offspring than can survive

Happens when two of more population interbreed this generally increases genetic diversity.

Essential for the continuity of life as they allow living organisms to reproduce as well as survive and function.

The breeding of dogs and species to look how we want

Species is no longer able to interbreed with its original population.

Individuals compete for limited resources such as food, water, space, mates (not all individuals will survive to adulthood)

Inheritable changes in the genotype which provide variation that can be acted upon by natural selection. They can be neutral, harmful or beneficial.

Change in climate, introduction of disease, loss of habitat, lack of genetic diversity (not mutations or variations), other populations better adapted, lack of food and water, pollution as well as human predation.

Not the actual body, it is how the organism lived, moved, its shape and what it ate.

That things that happened to an animal in its life changed its babies

The change in allele frequencies as a result of chance processes.