final Flashcards
(55 cards)
what is coevolution
closely associated species influence each other’s evolution
serious mutualism
what are engineering tools
used to discover the three genes in the monarch that allow them to eat milkweed containing the alkaloid toxin
cheetah and Thompson Gazelle
Cheetah evolved to run fast enough to catch gazelles. the Gazelle evolved to run fast enough to not get caught everytime
how/ why have ants and fungi coevolved?
ants depend on fungi for food. Fungi rely on ant for nutrients and protection
why are puppies attractive to us
they have evolved to communicate with humans
eyebrow movement
knows point
eye contact
bark
what is directional selection
evolve in one direction
what is disruptive selection
evolve in 2 extremes
stabilizing selection
evolve to stabilize one population
which type of selection applies to the adaptation of gall sizes in goldenrod gall flies
directional
bird selectively prey on larger galls
eurytoma gigantea
wasps ovipositer is too short to penetrate larger galls
the parasatoid wasps causes selection pressure favoring gall flies that form large galls
sexual selection
adaptations for gathering mates for breeding
sexual dimorphism
distinct differences between Male and female
male-male competition
female choice
male bird pretty to compete for the female gaze
polygny
one male mates w more than one female
female choice
intersexual selection
male choice
intrasexual selection
why isnt there sexual dimorphism in Canada goose
equal investment in reproduction and care for young
monogamy
1 partner for life
microevolution
genetic change in population from one generation to the next
change in gene frequency
macroevolution
process through which new species arise
mutation
changing of genes not on purpose
genetic drift
changes in gene frequency in a population over several generations due to random mating events
why are the green and brown beetles still the same species
they are capable of interbreeding
how could a new species of beetle evolve in this genetic situation?
geographic isolation