Describe the four observations that led to the idea of natural selection and give
examples for each.
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· Individuals within populations vary: variation can include traits other than
appearance, such as blooming time in flowers
· Some of the variation within individuals can be passed on to their
offspring: Darwin noticed that animal breeders could exaggerate traits
through selective breeding
· Populations of organisms produce more offspring than will survive: if the
organism has an advantage in breeding, they will pass on more of their
alleles- even slow breeding elephants can produce large populations
· Survival and reproduction are not random: fitness: relative survival and
reproduction of one variant, higher fitness= more babies and grandbabies.
Adaptation: traits that increase individual fitness in an environment-
individuals with specific adaptations are more likely to survive and
reproduce
,Open System:
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· includes the transfer and exchange of both mater and energy with the
system's surroundings: all systems of Earth are considered as "open
systems"
Wetlands:
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· Marshes (less trees), swamps (a wet land that is forested), prairie potholes,
floodplains- some will not have water all year round. Wetlands Ecosystem
services: filtering waste and pollutants, reducing flooding and erosion by
storms, helping sustain stream flow during dry periods, recharge ground
water, increased biodiversity, recreation
Logistic Growth:
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· Populations have the potential to grow exponentially, but they are limited
by environmental resources
Solvent:
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, · : a substance that can dissolve other molecules and compounds which are
known as solutes- because of its polarity and ability to form H-bonds,
water makes an excellent solvent- meaning it can dissolve many different
kinds of molecules
Scientific Method:
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· (1) Make Observations, (2) Make questions and statements about your
observations
Mangroves:
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well adapted tree/shrub that lives in salty or brackish water
Density independent factors:
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factors that limit the population that do not depend on the density of the
community (natural disasters, habitat destruction, climate)
Eutrophication
examples for each.
Give this one a try later!
· Individuals within populations vary: variation can include traits other than
appearance, such as blooming time in flowers
· Some of the variation within individuals can be passed on to their
offspring: Darwin noticed that animal breeders could exaggerate traits
through selective breeding
· Populations of organisms produce more offspring than will survive: if the
organism has an advantage in breeding, they will pass on more of their
alleles- even slow breeding elephants can produce large populations
· Survival and reproduction are not random: fitness: relative survival and
reproduction of one variant, higher fitness= more babies and grandbabies.
Adaptation: traits that increase individual fitness in an environment-
individuals with specific adaptations are more likely to survive and
reproduce
,Open System:
Give this one a try later!
· includes the transfer and exchange of both mater and energy with the
system's surroundings: all systems of Earth are considered as "open
systems"
Wetlands:
Give this one a try later!
· Marshes (less trees), swamps (a wet land that is forested), prairie potholes,
floodplains- some will not have water all year round. Wetlands Ecosystem
services: filtering waste and pollutants, reducing flooding and erosion by
storms, helping sustain stream flow during dry periods, recharge ground
water, increased biodiversity, recreation
Logistic Growth:
Give this one a try later!
· Populations have the potential to grow exponentially, but they are limited
by environmental resources
Solvent:
Give this one a try later!
, · : a substance that can dissolve other molecules and compounds which are
known as solutes- because of its polarity and ability to form H-bonds,
water makes an excellent solvent- meaning it can dissolve many different
kinds of molecules
Scientific Method:
Give this one a try later!
· (1) Make Observations, (2) Make questions and statements about your
observations
Mangroves:
Give this one a try later!
well adapted tree/shrub that lives in salty or brackish water
Density independent factors:
Give this one a try later!
factors that limit the population that do not depend on the density of the
community (natural disasters, habitat destruction, climate)
Eutrophication
