Exercise 11 Flashcards
(32 cards)
Natural selection
the difference in survival and reproduction that occurs among individuals of a population that differ in one or more alleles
the difference in survival and reproduction that occurs among individuals of a population that differ in one or more alleles
natural selection
Population
a group of individuals of the same species occupying a given area
a group of individuals of the same species occupying a given area
population
Species
one or more populations that closely resemble each other, interbreed under natural conditions and produce fertile offspring
one or more populations that closely resemble each other, interbreed under natural conditions and produce fertile offspring
species
Greater fitness
individuals that survive and reproduce will perpetuate more of their alleles in the population
Anthropologists
scientists who study human origin and cultures piece together the story of human evolution through the study of fossils, biochemistry, and anatomy
scientists who study human origin and cultures piece together the story of human evolution through the study of fossils, biochemistry, and anatomy
Anthropologists
Hominids
all species on the evolutionary branch leading to modern humans
all species on the evolutionary branch leading to modern humans
hominids
Evolution is…
the process that results in changes in the genetic makeup of a population over time
The major mechanism of evolution is…
natural selection
An organism whose genetic makeup allows it to produce more offspring than another of its species is said to have greater…
fitness
The earth was formed approximately…
4.6 billion years ago
The first living organisms appeared on the earth approximately…
3.8 billion years ago
Hominids with evolutionarily advanced skull characteristics would have…
a large cranium with prominent vertical forehead
The human ancestor whose populations dispersed from Africa to other parts of the world was…
Homo erectus
A catastrophic global event in which major groups of species disappear is called…
mass extinction
The organism believed to be the common ancestor of modern apes and humans is…
Australopithecus africanus
Fossils
- remains of organisms
- are formed when organic materials are placed with minerals
- provide evidence of evolution
Adaptive radiation
a lineage fills a wide range of habitats in a burst of evolutionary activity (follows mass extinction)
Primitive teeth
many large, specialized
Primitive jaw
Jaw and muzzle long
