Power-horse Library

Angiosperm - Answer -flowering plant -has seeds with casing -has endosperm in seeds -fruit -most diverse Radiometric methods of dating - Answer -K/Ar (lava, 500K+ years) -C14 (conversion to N14, 40K yrs) -Thermoluminescence (burning) -Electron spin (teeth) -Uranium Lead (mineral deposits) Relative methods of dating - Answer -magnetic reversals -extinct and distinct species Primate - Answer -climbing/locomotion adaptations -big brain -opposable thumbs and prehensile tails -na...

Criteria for natural selection - Answer variation, heritable, influences fitness natural selection acts on __________ and evolutionary change acts on _____________ - Answer individuals, populations Artificial selection - Answer driven by humans selectively breeding How fast/far can artificial selection go? - Answer FAST -depends on how many genes -how much the phenotype is controlled by the environment FAR -presence of deleterious trade offs -limits of the genetic variation availab...

1. Darwin described evolution using the phrase "descent with modification." Please select the response that describes most accurately from a modern perspective what the phrase entails. A) Evolution takes a long time - it is a gradual process - and produces decent results. B) Evolution is a natural phenomenon that is ongoing, changing individuals even today. C) Closely related species are similar at the genetic, developmental, and structural levels. D) Populations living today are identi...

What is the carbon cycle? Why is it important? - Answer The carbon cycle is the mouvement of carbon between species, the earth, the atmosphere and oceans. Without carbon, ecosystems would not function and persist over time. Most exchanges involve the ocean. What are the crucial processes in the carbon cycle? Why are they important? - Answer Cellular respiration and photosynthesis. They cancel each other out so that there isn't too little CO2 (causing a frozen earth) or too much CO2 (causi...

what is a biological community? - Answer All of the populations of organisms living and interacting in a particular area commensalism - Answer interaction where one species benefits and the other is unaffected competition - Answer interaction where individuals use the same resources, lowering fitness for both -/- consumption - Answer interaction where one organism eats or absorbs nutrients from the other, +/- mutualism - Answer interaction where two species benefit +/+ three key t...

what is a biological community? - Answer All of the populations of organisms living and interacting in a particular area commensalism - Answer interaction where one species benefits and the other is unaffected competition - Answer interaction where individuals use the same resources, lowering fitness for both -/- consumption - Answer interaction where one organism eats or absorbs nutrients from the other, +/- mutualism - Answer interaction where two species benefit +/+ three key t...

is culture and cumulative cultural change common in other animals? - Answer culture is common in other animals but cumulative cultural change is rare what is culture? - Answer the shared information acquired through social learning guest speaker Taru Vasanthan conducted her research on what species? - Answer tardigrades would organisms in an aphotic zone of the ocean use photosynthesis? - Answer the organisms would not use photosynthesis why may have bipedalism evolved in hominins? -...

change from gen to gen via selection of heritable traits evidence for evolution - Answer - fossils - extinction - transitional forms - vestigial traits why is the myth about evolution being goal oriented false? - Answer species do not adapt because they "want" or "need" traits; they adapt them because an ancestor with that triat just so happened to reproduce sooner or more successfully than others why is the myth that evolution is a hierachy false? - Answer evolution is more a ne...

Population - Answer - a group of individuals from the same species that occupy an area of space at the same time - can produce viable offspring - uses the same resources and are affected by similar factors Ecology - Answer - the study of how organisms interact with their environment What is population ecology? - Answer - measures changes in population size, pop composition - identifies factors that cause changes in population - studies how and why a population changes over tiime -IMP ...

Population - Answer - a group of individuals from the same species that occupy an area of space at the same time - can produce viable offspring - uses the same resources and are affected by similar factors Ecology - Answer - the study of how organisms interact with their environment What is population ecology? - Answer - measures changes in population size, pop composition - identifies factors that cause changes in population - studies how and why a population changes over tiime -IMP ...