Evolution
what is natural selection? describe.
Survival of the fittest. organism w/ favorable traits for an environment would survive and be able to reproduce more times.
what is the only way variations can be passed on?
gametes
In order to survive, what does the organism need to survive the current enviornment?
An favorable trait that is fit for the current environment
Why U Short?
cuz SKILL ISSUE
what is adaptations and what is the result of?
favorable traits that help organisms to survive an environment. result is natural selection dum dum
what type of evidence is used to determine evolutionary relationships between present-day species?
gel electrophore(yourmom)sis
Beak stucture differ between indiviuals of one species of bird. These differences most likely caused by
1)different food soures
2)reduced rate of population
3)a large supply of one kind food
4)huge amount of predators
5) your mom
1 and 5 :)
why u take drugs
cuz he short
what are the 2 sources of variation?
sexual reproduction( meiosis. genetic recombination, fertilization) and mutation
Why does extinction happen?
Bc the species adaptation are no longer fit for the changing environment.
Limited resources causes evoluationary changes in animals by increasing...
1)genetic variation
2)competition
3)mutations
4) decreasing your height
2 bud
what missing
some inches
How does body cell mutation passed to other body cells and can the offspring get it?
Through mitosis. the offspring can't obtain the mutation due to it not being in the gamete instead
What evidence is used to determine evolutionary relationships between extinct species?
Structual evidence of fossils
where does a resistant population of bacteria come from overtime?
from a few bacteria's that have genes or traits that is resistant to the chemicals. over time they increase in population due to mitosis.
why dum
cuz no asian
What does fossil record prove?
IT PROVES THAT EVOLUTION HAPPENS OVERTIME
What are the 2 things necessary for natural selection to take place?
Competition and variations in the population
what are favorable traits and adaptations results of?
Natural selection
why acne
cuz skill issue