Genetics
What is a somatic mutation?
mutations that happen spontaneously in the span of your life. (e.g. skin cancer)
Human ancestry is traced back to ________.
What is an adaptation?
evolutionary process of natural selection that fits organisms to their environment, enhancing their evolutionary fitness.
What is a biosphere?
The part of the world where life can exist.
What is another word for overexploitation?
To over-use.
Humans use all of the genes we have, true or false?
False
What is Darwinism?
the theory that all species of life have descended from a common ancestor.
What are three examples of human adaptations?
bipedalism (ability to walk on two feet), opposable thumbs (which can touch the fingers of the same hand), and complex brain.
Why is ecology important?
It allows us to keep tabs on endangered species, help save animals that balance out ecosystems, keep tabs on climate change, etc.
What is an example of overexploitation in the ocean?
Over-fishing
How many genes do humans have?
between 20,000 and 25,000 genes.
What are THREE pieces of evidence for evolution?
ancient organism remains, fossil layers, similarities among organisms alive today, similarities in DNA, and similarities of embryos.
What are two examples of hybridization?
Mule and Liger
use most of the resources in the area, kill other animals excessively, cause disruptions to the balance, etc.
What does overexploitation cause?
Rivers to run dry, animals to go extinct, forests to disappear, climate change, etc.
Genes carry instructions that tell your __________ how to work and grow.
cells.
Humans and monkeys evolved together from what animal?
Lemurs
Divergently
What are three examples of limiting factors?
Food, water, mate selection, hunting, deforestation, etc.
why do 35,000 species go extinct every year?
overexploitation, climate change, droughts, floods, severe weather, etc.
How do environmental pressures have an effect on what animals look like and how they behave?
environmental pressures cause genes to express themselves and gene expression proteins act as both an on/off switch to control when proteins are made.
Who was Lucy?
The first Australopithecus discovered in Ethiopia.
What cause adaptations to occur?
Environmental pressures.
How do organisms interact with their ecosystem?
Food, water, habitat, terrain, etc.
Where is climate change causing the most harm?
Third-world countries, forests, places with dense populations, places with lots of pollution, etc.