unit 7 part 1 (7.1-7.5) Flashcards
evolution
change in the genetic makeup of a population over time
natural selection
process that organisms, having adaptions suited for a particular environment, have a greater chance of survival and reproduction, passing the adaptations to subsequent generations
competition
organisms struggle with other organisms to get limited resources like space, food, mates, nutrients, light
variation
genetic differences among organisms (mutations and sexual reproduction increase variation)
adaptations
traits that provide an advantage in a particular environment, increase chances of survival and reproduction
fitness
ability of an organism to survive and produce offspring
reproductive success
production of offspring
heritability
ability to pass on adaptations to successive generations
what contributes to fitness?
heritability and reproductive success
biotic vs abiotic
biotic is living things and abiotic is nonliving components
populations are less likely to evolve in a __ environment
stable
use and disuse
parts of the body that are used frequently become larger and stronger while others deteriorate
descent with modification
unity of life is attributed to decent of all organisms from one ancestor that had modifications along the way
artificial selection
humans modify other species by selectively breeding individuals for desired traits (dog breeding)
key thing rizz wanted us to know
individuals do not evolve, populations evolve over time
homology
similar characteristics that function differently