Life 103 csu - Study guides, Class notes & Summaries

Life 103 Exam 1 CSU Questions and Answers Already Passed Science recognizing patterns in the natural world and understanding the mechanisms that give rise to those patterns The Diversity of Life Patterns How plants and animals work Mechanisms Evolution the change in allele frequencies in a population over time Four Mechanisms of Evolution Selection, Genetic Drift, Mutation, and Migration Selection changes in allele frequencies due to organisms with advantageous alleles rep...

Parenchyma cells - Play a role in storage, secrection, and photosynthesis in cells. Have thin and flexible primary walls, large central vacuole, lack secondary walls, photosynthesize Ground Tissue - Tissue system that makes up the majority of a plant What is ground tissue composed of? - Parenchyma, collenchyma, sclerenchyma Collenchyma cells - Provide flexible and mechanical support; found in stems and leaves, used for new plants. Lacking secondary walls. Strings on a celery stalk Sclerenc...

Evolution - The change in allele frequencies in a population over time Selection - Changes in allele frequencies due to organisms with advantageous alleles reproducing more successfully than organisms with other alleles Genetic Drift - Random changes in allele frequencies in a population Mutation - The source of all new allelic diversity Migration - Movement of alleles between populations Adaptation - A trait that evolves by selection for a particular function (because it increases fitness...

Flowers - specialized structure for sexual reproduction, pollination by animals (insects, mammals, birds) and wind Seed - consists of an embryo and nutrients surrounded by a protective coat. Gametophytes of seed plants - develop within the walls of spores that are retained within tissues of the parent sporophyte The ancestors of seed plants were most likely_____, while seed plants are ________. - homosporous; heterosporous Ovule - consists of a megasporangium, megaspore, and one or more p...

Phylogeny - Answer-Classification of organisms according to evolutionary relationships. Taxonomy - Answer-Evolutionary classification Linnaean system of classification (taxonomy) - Answer-Domain> Kingdom> Phylum> Class> Order> Family> Genus> Species (Did King Phillip Come Over For Grandma's Soup) [ex. Homo sapien](italicized) Phylogeny relationships - Answer-Basal Group: Branch from oldest common ancestor, no other branch from species. Sister Taxa: Share common ance...

Science - Answer-recognizing patterns in the natural world and understanding the mechanisms that give rise to those patterns The Diversity of Life - Answer-Patterns How plants and animals work - Answer-Mechanisms Evolution - Answer-the change in allele frequencies in a population over time Four Mechanisms of Evolution - Answer-Selection, Genetic Drift, Mutation, and Migration Selection - Answer-changes in allele frequencies due to organisms with advantageous alleles reproducing more succe...

Science - Answer-recognizing patterns in the natural world and understanding the mechanisms that give rise to those patterns The Diversity of Life - Answer-Patterns How plants and animals work - Answer-Mechanisms Evolution - Answer-the change in allele frequencies in a population over time Four Mechanisms of Evolution - Answer-Selection, Genetic Drift, Mutation, and Migration Selection - Answer-changes in allele frequencies due to organisms with advantageous alleles reproducing more succe...

Classification of organisms according to evolutionary relationships. - Answer-Phylogeny Evolutionary classification - Answer-Taxonomy Domain> Kingdom> Phylum> Class> Order> Family> Genus> Species (Did King Phillip Come Over For Grandma's Soup) [ex. Homo sapien](italicized) - Answer-Linnaean system of classification (taxonomy) Basal Group: Branch from oldest common ancestor, no other branch from species. Sister Taxa: Share common ancestor - Answer-Phylogeny relationshi...

Eukaryotic cells evolved when an ancestral host cell, probably a ____________ formed a mutualistic, endosymbiotic relationship with ______________ - Answer-Archaean; an alphaprotobacteria Snowball Earth Hypothesis suggests the hardened, spiny exoskeleton evolved as a result of: - AnswerRelease of calcium after global glaciations You find a colony of single celled organisms that are living (thriving and reproducing) in an extreme environment, such as an alkaline or reducing environment. Which...