Evolution
descent with modification
what is evolution
produces regular cells and is used for cell repair; is 1 round of duplication, 1 round of division; and produces 2 daughter cells
what is mitosis
favors individuals at one end of the phenotypic range
what is directional selection
a species that has been moved by humans into an environment that they do not reguarly occur at
what are introduced species
plants that can only survive in wet/damp areas are --------- plants
what are non-vascular plants
lineages splitting and making new species
what is speciation
makes sperm and egg cells; is 1 round of duplication, 2 rounds of division; and makes 4 haploid cells
what is meiosis
selection against both extremes
what is stabilizing selection
species that are crucial to the environment
plants that can live in dry areas are ---------- plants
what are vascular plants
leftover structures from our ancestors that serve no function to us
what are vestigial structures
adenine bonds with
what is thymine
variance increases and extreme phenotypes are favored
what is disruptive selection
introduced species that become harmful to the environment
what are invasive species
the developing embryo, they only plant in the best conditions
what are seeds
it occurs when two species are very distantly related but they live in the same environment so they develop similar traits
what is convergent evolution
the process of making mRNA into proteins is
translation
occurs when natural selection maintains stable frequencies of two or more phenotypic forms in a population
what is balancing selection
the inevitable elimination from a habitat of one of two different species with identical needs for resources.
what is competitive exclusion
plants that don't need water to survive, but need it to reproduce are ------- plants
what are seedless vascular plants
1) there must be variation among the people of a population
2) the traits must be inheritable
3) the traits must improve survival and reproduction
what are the three requirements to natural selection
the process of making DNA into mRNA is ----------
transcription
distinct difference in size or appearance between the sexes of an animal in addition to difference between the sexual organs themselves.
what is sexual dimorphism
the role and position a species has in its environment
what is an ecological niche
plant sperm that allows plants to reproduce without water
what is pollen