BIOL 1P92 Final Exam Questions And 100% Verified Correct Answers

BIOL 1P92 Final Exam Questions And 100% Verified Correct Answers What is coevolution? - ANSWER The process by which two or more species of organisms influence each others evolutionary pathway When did seed first appear in the fossil record? - ANSWER Seeds first appeared during the Devonian period about 400 million years ago What does it mean that protists are not monophyletic? - ANSWER This means that all protists are not more closely related to each other than they are to some other kinds of organisms In other words, organisms are closely related to other kingdoms than they are to other protists What is the group of protists that we are most closely related to? - ANSWER Choanoflagellate are a group of protists that are most closely related to sponges Sponges are the simplest forms of animals (animals but the question asked about humans) What is alternation of generations? - ANSWER Refers to having 2 different forms of life in the life cycle This means a fluctuation between haploid and diploid stages that occur in plants Also known as heterogenesis Classifications A dog and a human share the same domain, kingdom, phylum, and class however, a dog's order is carnivore and a human's is primates This means that the order, family, genus and species are not shared between dogs and humans Approximately how fare back in time does the fossil record extend? - ANSWER Fossils date back to 3.5 billion years ago (3,500,000,000) The origin dates back to 4.55 billion years ago (4,550,000,000) The ancestors of what free living cells were the earliest autotrophs contributions to to oxygen in the atmosphere? - ANSWER Cyanobacteria *a phylum of bacteria that obtain their energy through photosynthesis *the only photosynthetic prokaryote able to produce oxygen How do we know that prokaryotes evolved before eukaryotes? - ANSWER The process of endosymbiosis and how mitochondria and chloroplasts eventually evolved into prokaryotic cells making them eukaryotes There was hardly any oxygen during the archean period so everything was anaerobic What are the characteristics of animals? - ANSWER Multicellular Heterotrophs No cell walls Nervous tissue Sexual reproduction ( Which of these don't apply to humans and dogs) - ANSWER Domain Kingdo m m Phylu Class Orde r Famil y Genu s Species Extracellular matrix Special clusters of Hox genes Similar to tRNA Characteristic cell junctions Examples on pages 704 in the textbook Which of the following is a plant? - ANSWER You will be given a list of animals and one plant Name the period that corresponds to about 500 million years ago - ANSWER The Cambrian period contains the Cambrian explosion Where do all major body plans appear in the fossil record? - ANSWER Burgess Shale 508 million years ago Middle of the Cambrian period What does the double barrel name refer to? - ANSWER First- genus Second- species Evolution of animals from earliest to recent (know animal phylogeny)? - ANSWER 1)Porifera 2)Cnidaria/Ctenophora 3)Platyhelminthes 4)Rotifera 5)Bryozoa 6)Branchiopoda 7)Mulloska 8)Annelidia 9)Ecdysozoa 10)Dueterostomia