Natural Selection And Adaptations Of Plants. Flashcards
Name and define examples of adaptions that help organisms.
Defensive Camouflage-lets the animal blend into surroundings.
Chemical- emits a substance that is poisonous to predators.
Mechanical defenses- actual structural defenses to help get away from predators.
What are the 5 criteria to be non-evolving.
No selection pressures No mutations Isolation Random mating Large population.
What are the five criteria of evolving?
(Only need one to be evolving)
Small population Immigration or emigration Mutations Natural selection Mating preferences.
If 1 out of every 25 apes is blue not brown and being brown is dominant. What is the frequency of the dominant allele?
80%
Why is Lamarckism theory wrong?
Animals do not pass on the adaptations they acquire they pass on genes they already have.
What are the basic principles of Darwin’s theory of evolution?
Animals evolve over time
Physical traits are inherited
There is variance in populations.
What is stabilizing natural selection?
When nature selects for the in between of the graph and the edges go in
What is directional natural selection?
When nature selects for an extrem and the graph moves in that direction.
What is disruptive natural selection?
When nature selects for both extremes and the graph becomes two new graphs.
Define species and process of speciation.
Species is all animals with all the same characteristics and speciation is the process of putting organisms into a species.
Name and explain the function of three parts of flowers.
Stamen-the male reproductive organ on plants.
Carpel/Pistal- the female reproductive organ on a plant.
Petal-to attract pollinators.
What is plant pollination and how is it done?
When pollinators take the pollen from one plant into another and pollinate other plants.
List and define three examples of adaptations to help plants survived.
Chemical- they produce a substance that is poisonous to different animals.
Morphological- an adaptation that physically damages their predators.
Nutrient exclusion- when the plant hides their nutrients and keep it for themselves.
