Evolution Flashcards
What are the characteristics of life?
—Grows, changes, repairs
—Reproduces
—Has DNA
—Made of cells
—Respires
—maintains homeostasis
—has a metabolism/processes energy
—responds to environment
What are traits?
Observable characteristics
What are the three trait styles?
Physical, behavioral, physiological/metabolic
What are trait variations?
They are changes in traits due to genetic mutations
What are the biggest and smallest groupings in the “System of Taxonomy?”
Domains and Species
Who thought up the theory of evolution?
Charles Darwin
What is evolution?
Evolution describes the ways in which populations change over time from generation to generation.
What are populations?
Organisms of the same species living in the same general area.
What is an adaptation?
A variation that gives an organism an advantage in “Surviving, thriving, and reproducing.”
What is natural selection?
When the environment determines which traits are desirable and which are not.
What are selection pressures?
Stresses put on population (Predators, climate change, competition for resources, pollution, diseases, parasites, habitat loss)
What is sexual selection?
When a potential mate determines which traits are beneficial.
Who would be more likely to have the most impact in sexual selection?
The one that’s going to put the most energy into raising the offspring. (Usually females)
What would some males have more vibrant colors?
To impress and show the females during mating that they have a lot of available energy.
What is artificial selection?
When humans decide which traits are beneficial in other species.
What could artificial selection also be called?
Domestication
When a population evolves to the right or left, growing in one of the extremes
Directional change
When a population evolves to both the left and the right, gaining both extremes and losing the average
Diversifying change
When a population evolves to the middle, losing both the extremes and gaining the average
Stabilizing change
What is a niche?
Section of a habitat where an organism lives and the resources it consumes there.
What is a habitat?
The environment where an organism lives.
Resources come in ____ types.
Two
What are Biotic resources?
Living resources (other organisms)
What are abiotic resources?
Non-living resources (Terrain, temperature, available H2O, amount of sunlight, available nutrients, pollution, concentration of co2 and o2)
