Flashcards in Bio Test #8 Deck (28):
study of relationships between living organisms & their environment
community & its abiotic environment
all organisms of the same species that live in the same area at the same time
population of different species interacting in the same area
group of individuals that can interbreed & produce fertile offspring
location within which a species normally lives
producer; organism that can synthesize organic molecules from unorganic molecules
consumer; can obtain organic molecules from other organisms
What are types of heterotrophs?
herbivores, carnivores, detritivores
organisms that feed on plant matters
organisms that feed on other organsims
organisms that feed on non living organism matters
secrete digestive enzymes on either living or nonliving organisms and then absorb the product of external digestion
diagrams that show the linear flow of energy by showing "who eats whom." The arrow points toward animal that eats. "not the one that is eaten." must be specific
diagrams that show how food chains are linked. They offer a more complete picture
What are limitations of food web?
difficult to construct accurately (can take years); sometimes we don't know all the relationships between organisms; diet changes with season and that is not shown by food web
cumulative change in heritable characteristics of a population
the environment select traits that are most favorable by allowing organisms with a certain trait to survive. Because they survive, they will be more likely to reproduce & pass the trait onto their
struggle for survival
organism must compete for food, territory, shelter, mates, water, and health
What are the three pieces of evidence for evolution?
artificial selection/ breeding
ancient, preserved remains of an organism
can be dated (age of rock formation it is), show gradual change of organisms
show extinction, still not complete (several gaps)
men have selectively been breeding animals/plants for 1000s of years to suit their needs; if an animal show a favorable traits that animal will be allowed to breed in the hopes that the trait will be passed on to the offspring
organisms that share a common ancestor will show or retain some common structures; vestigial structures
modified; enlarged or reduced
What are vestigial structures of homologous structures?
2 organisms that do not share a common ancestor & have a structure that fulfills the same function