Evolution Flashcards
mutations
are the source of new alleles in a population’s gene pool
Population
individuals of the same species in a specified area
gene pool
all genes found in one population
changes in allele frequency of a population is called
microevolution
natural selection
differential survival and reproduction among individuals of a population that vary in details of their shared traits
directional selection
changing environmental conditions can shift allele
sexual dimorphism
lions look different if male or female
genetic drift
a random change in allele frequencies over time
Sympatric speciation
new species form within a range of existing species
like different types of birds
parapatric speciation
has to do with their habitats
coevolution
two species co depend on each other: predator and prey
community
all the species that live in a region
interspecific competion
between different species
intraspecific competition
between same species
niche
required environment for species
mimicry
harmless animal looks like a dangerous one
parasitoids
lay eggs in other insects
indicator species
especially sensitive to disturbances to the environment
Fraculatative anerboe
organism that makes ATP by aerobic respiration if oxygen is presetn
obligate aerobe
cannot make AtP in absence of oxygen
the earliest t organisms of Earth are from
Bacteria and Archaea domains
amniote
shelled eggs not dependent on water
tetrapod
four legged walkers