Last common ancestor Study guides, Class notes & Summaries

What are properties of all cells? - Growth Metabolism Evolution LUCA - Last universal common ancestor How do we decide how the phylogenetic tree is drawn? - Use ribosomes. All organisms have it and it has been the same for billions of years What are the domains? - Bacteria Archaea Eukarya What defines the domains of cells? - Their rRNA sequencing What domains are most closely related? - Archaea and eukarya What emerged from Archaea? - Eukarya How do we know kw when oxygen appeare...

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...

Microbe CORRECT ANSWER -Free living organisms so small that they are only visible under the microscope. -Viruses are not really microbes- they lack one key quality of living cells; the capacity to main their bodily integrity throughout their life cycle. -Exceptions: Epulopiscium fishelsoni is huge (600+ um), Mycobacterium leprae is not free living. -Bacteria, Archaea, Fungi, Protists. LUCA CORRECT ANSWER -Last Universal Common Ancestor= microbe -About 4 bya -Core features for cellular...

which are not cephalized mussels, clams, Hemimetabolous (of an insect with aquatic young) undergoing incomplete metamorphosis in which the young does not resemble the adult holometabolus dramatic change Cnidaria cnidocytes, radial symetry, incomplete gut, sting, anemonies, jellies, monophyletic ALL descendants came from one common ancestor paraphyletic Pertaining to a group of taxa that consists of a common ancestor and some, but not all, of its descend...

Microbiology Straighterline Final Questions And Revised Correct Answers The study of evolutionary relationships among organisms is called ______. - CORRECT ANS : phylogeny The three cell types discussed, eukaryotes, archaea, and bacteria, all derived from ______. - CORRECT ANS : Last Universal Common Ancestor Organisms called parasites are ______. - CORRECT ANS : always harmful to their host Which of the following does not indicate microbe involvement in energy and nutrient flo...

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...

A diagram of the three domains (Bacteria, Archaea, Eukarya) proceeding from the Last Universal Common Ancestor would show Archaea a. as the original cells from which the others derived b. branching off the domain Eukarya c. branching off of the domain Bacteria - Answer - b. branching off the domain Eukarya A frameshift is caused by _____ mutations a. missense and insertion b. missense and nonsense c. nonsense and deletion d. deletion and insertion e. insertion and nonsense - Answ...

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...

What type of trait is not useful to construct a phylogenetic tree? correct answer: Analogous traits Which of the following traits are not unique to humans among the great apes? correct answer: Lack of a tail How complete is the fossil record of life on earth? correct answer: It is an incomplete record of Earth's history What is a polyphyletic group of organisms? correct answer: A group that does not include a common ancestor. What is the biological species concept based on? corr...

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...