Bio 1m03 stuvia Study guides, Class notes & Summaries

Angiosperms - Answer - ovules are covered by ovary - vascular plant w flowers - produce fruit - has seeds (innovative) - most diverse land plants - dominated habitats in cretaceous period Gymnosperm - Answer Ovules lack cover Relationship between Angiosperms/Animals - Answer - Coevolved (complex) - Animals assist with pollination/defense/disperal - Animals are rewarded with nect/fruit/shelter - Allows for development of niches/diversification Dating Ocean Core Strata - Answer -...

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...

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 ...

Ecology - Answer The study of how living things interact with each other and their environment - Environments are changing more rapidly now than they have at any time in the past - Efforts to maintain human health and welfare depend on our ability to cope with these environmental changes - Most synthetic field in biology Primary goal of Ecology - Answer To understand the distribution and abundance of organisms 4 Main Levels of Ecology - Answer 1) Organisms 2) Populations 3) Commun...

Why might Pasteur's experiment be inconclusive? - Answer The swan-necked flask broth may not support cell growth, or the broth was poisoned. Experiment did not confirm hypothesis that all cells come from pre-existing cells Why are replicates important in experiments? - Answer To ensure that results were not achieved by random chance What is the definition of a replicate? - Answer Unit that shares a common thing (4 mice in one cage = 1 replicate) What does the law of succession suggest?...

The origin of mammals occurred in which era? - Answer Triassic Period (252 Ma- 201 Ma) What are some key events that occurred within the Triassic Period? (2 points) - Answer - Pangea supercontinent formed through continental drift. - Therapsida groups had evolved within vertebrates Therapsida groups had increased metabolic rate inferred through: ___________________ (3 points) - Answer - upright posture (relative to reptiles) - muscular diaphragm for enhanced breathing - breathing while ...

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...

Why might Pasteur's experiment be inconclusive? - Answer The swan-necked flask broth may not support cell growth, or the broth was poisoned. Experiment did not confirm hypothesis that all cells come from pre-existing cells Why are replicates important in experiments? - Answer To ensure that results were not achieved by random chance What is the definition of a replicate? - Answer Unit that shares a common thing (4 mice in one cage = 1 replicate) What does the law of succession suggest?...

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...