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Evolution/Human Family Tree (Natural Selection (Natural selection explains…
Evolution/Human Family Tree
Natural Selection
Natural selection explains how life started
All living things share a common ancestor
In a family, there are differences (variations)
Natural selection (aka survival of the fittest) causes evolution
Organisms that fit their environment the best will survive reproduce
Humans and monkeys share a common ancestor, but did not come from each other
Human Evolution
Paleontologists have found fossils of past humans
The oldest human fossil was found in Africa
Humans and apes share a common ancestor
Modern humans are homo sapiens (wise human)
Humans are a part of the Primates group
Humans evolved to have larger brains, taller bodies, use tools, and form communities
Fossils
Oil, gas, and coal comes from fossils (fossil fuels)
Over millions of years, dead plants were compressed into coal
There are different types of fossils such as body, trace, mold, and cast
The fossil record is incomplete, because not everything becomes a fossil
Fossils are the remains of things that died long ago and must have a quick burial
Fossils tell us about Earths history and it's living things
Charles Darwin
He disagreed with other scientists, because he thought evolution takes a very long time to happen
He wrote a book called "The Origin of Species"
He observed that the animals were different based on their enviroment
While traveling, he studied many plants and animals
The Theory of Evolution is supported by a lot of evidence, such as genetics and heredity
Charles Darwin developed the modern Theory of Evolution
Plant Adaptation (Jr)
Plants adapt to get more sunlight and water
Plants adapt to get nutrients, from soil or animals
Plants have various adaptations, such as underground roots
Plants adapt to reproduce by using pollen
Living things adapt to meet their needs
Plants have evolved by using a number of adaptations
Flu and Flu Vaccine
Vaccines have been developed to help people fight off viruses
Viruses can have different strands (versions), based on their genes
Viruses can mutate and evolve
The flu can cause symptoms such as a fever
The flu is caused by the influenza viruses
Before advanced medicine, the Spanish Flu killed a lot of people
Facts about Human Species
Humans lived from 300,000 years ago
Humans are part of the homo group
Homo group were first to expand out of Africa
12,000 years ago, humans transitioned from making stone weapons to producing food
Modern human faces have smaller teeth and jaws