Evolution Change Across Time

The purpose of creating a timeline is to physically see when certain events occured and how much time was spaced between them.

I learned that many of the events were close together. They also occured more recently that I had thought.

Paleontologists research the geology and history of the Earth. When they find fossils, it helps them understand where certain organisms lived and what traits they have. It also shows where they were located over time.

An evolutionary biologist researches how living things function. This shows how living organisms function differently over time. They look at different forelimbs and compare the postitions they're in.

Developmental biologists research how life begins and the beginning stages. the DNA and embryos tell scientists which organisms may look alike and/or what stage their developing in.

A physical anthropologist resarches the evolutionary history of humans and primates. They compare the bones of primates, which provides evidence for evolution.

-features the exsist, but serve no function -feature that was useful to an ancestor, but is no longer useful to the modern organism example: human appendix, whale leg bones

-similar features that originate from a shared ancestor -look different and have different functions -skeletal structures very similar and have derived from the same embryological structures example: forelimbs of animals

-features that serve similar functions and look similar -have different embryological development -very different internal anatomy example: bird wings vs. insect wings

The half-life is the amount of time it takes a radio active element to decay into half of what it was. ___+ 5734 carbon

-constantly bipedal and walk upright. -larger brain grasping thumb

Species: australopithecus genus: afarensis

Neanderthals

Natural selection is when an adaptation starts to arise in a population and is best suited for an organism's survival in its environment. The population passes down this adaptation to generations. Over time, the population keeps growing and a new species may form.

The peppered moth lives in forests. Industrial revolution are factories that were being built, and they ran by burning coal for fuel. The result was a dark smoke that covered the surrounding countrysid. the peppered moths were light colored and were easily spotted by predators. Peppered moths became dark-colored and this helped them to survive.