Evolution: Evidence, Mechanisms, and Human Variation - Test
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What is the theory of evolution?
Explains the diversity of life on Earth through natural selection, adaptations, and genetic variation.
What is evolution?
A change in allele frequencies over time.
What are the seven types of evidence that support the theory of evolution?
Fossil record, biogeography, anatomical homologies, molecular homologies, embryology, antibiotic resistance, pesticides/herbicide resistance
What is the fossil record?
Demonstrates life’s progression through fossils
What is biogeography?
A species’ global distribution results in unique characteristics among species on different land masses
What are anatomical homologies?
Similar features that are inherited from common ancestors, but have different functions
What are molecular homologies?
Similarities in DNA, RNA, or protein sequences between different species (Ex: Banana and human)
What is embryology?
Shared early developmental stages between different species
What is antibiotic resistance?
Bacteria with the resistance trait survives, and results in a antibiotic resistant bacterial population
What is pesticide/herbicide resistance?
Resistant pest’s survival leads to the inheritance of resistance traits within a species
What are selective pressures?
Environmental factors that influence the reproductive and survival success of a population
What are biotic selective pressures?
Living things (predators, competition, disease, availability of food)
What are abiotic selective pressures?
Non-living (climate, habitat, temperature, availability of water)
What is natural selection?
Organisms with advantageous traits to their environment are more likely to survive and pass those traits to their offspring
What are adaptations?
Traits (characteristics inherited from an offspring’s parents) that have evolved over time through natural selection to give the organism advantages in its environment
What is fitness?
Organism’s ability to survive and reproduce
What is DNA?
Nucleic acid biomolecule, passed from parents to offspring
What are genes?
Segment of DNA that contain the instructions for the development of specific traits.
What are alleles?
Different versions of a gene that determine variations of a trait (either Dominant or Recessive)
What are phenotypes?
Observable/measurable characteristic
What is the genotype?
Alleles present for the gene influencing the characteristic
What is allele frequency?
Relative frequency of an allele compared to the total number of alleles for that gene in a population.
What is sexual selection?
Mating preferences within a population
what is artificial selection?
Humans choose which traits are passed on