Geological timescale - Study guides, Class notes & Summaries

Macroevolution changes in a population over very long periods of time. Speciation the splitting of one species into two or more new species Biological Species Concept offers testable way to define a species that does not depend on appearance: The members of a species interbreed and have a shared gene pool, & each species is reproductively isolated from every other species. Gene flow occurs between the populations of a species, but not between pops of diff species. Biolo...

Bio 101 Unit 4 Questions and Answers Graded A What characteristics of Archaeopteryx tell us that it is a link to reptiles and birds? feathers and teeth Given the comparative study of embryology, it is concluded that genes controlling embryonic development are essentially the same. True Members of two different species are never capable of mating. False Which event was not involved in the Permian mass extinction? large meteor impact Shared derived traits are found...

BIOLOGY 171 EXAM 3 VOCABULARY LECTURE 13_17adaptive radiation—process in which organisms diversify rapidly from an ancestral species into a multitude of new forms (usually with ecological opportunities and morphological innovations) animals Archaeopteryx—oldest known fossil bird of the late Jurassic period; it had feathers, wings, and hollow bones like a bird, but teeth, a bony tail, and legs like a small dinosaur Archean Eon—4 to 2.5 BYA; oceans, volcanism, atmosphere-no oxygen, orig...

Geologic Time Scale correct answersthe "calendar" for events in Earth history. It subdivides all time into named units of abstract time called—in descending order of duration— eons, eras, periods, epochs, and ages. ● Thanks to the work of early geologists like Steno, Arduino, and Smith, modern scientists have used these and other clues to create what we now call the Geologic Time Scale,or GTS. ● The GTS has been reworked many times to reflect the latest knowledge of Earth's histo...

Bio 101 Unit 4 Questions and Answers 100% Verified What characteristics of Archaeopteryx tell us that it is a link to reptiles and birds? feathers and teeth Given the comparative study of embryology, it is concluded that genes controlling embryonic development are essentially the same. True Members of two different species are never capable of mating. False Which event was not involved in the Permian mass extinction? large meteor impact Shared derived traits are found in all members of the i...

Bio 101 Unit 4 Questions Answered 100% correct What characteristics of Archaeopteryx tell us that it is a link to reptiles and birds? feathers and teeth Given the comparative study of embryology, it is concluded that genes controlling embryonic development are essentially the same. True Members of two different species are never capable of mating. False Which event was not involved in the Permian mass extinction? large meteor impact Shared derived traits are foun...

Marine Biology Questions and Answers Already Passed 1. List and discuss 4 practical reasons why it's a good idea to study marine biology. 1.) It can cause problems 2.) Important part of our economy 3.) Used in medicines 4.) Life on earth originated from the sea 2. In economic terms the ocean's living systems are estimated to be worth ____ a year. 21 trillion 3. Evidence of the use of marine organisms as a source of food date back to as early as... 165,000 years 4. The ________ were the firs...

IB ESS TOPIC 7, Exam Questions section and answers, 100% accurate, Renewable - -Natural resources that have a sustainable yield or harvest equal to or less than their natural productivity Non-Renewable - -natural resources that cannot be replenished within a timescale of the same order as that at which they are taken from the environment and used (e.g. fossil fuels) Fossil fuels - -non-renewable resources including oil, coal, natural gas and shale gas Oil - -Advantages - cheap, ve...

Bio 171 Exam 3, questions and answers, 100% accurate answers If a defensive compound is always present in an organism, then it must be a constitutive defense. false LECTURE 15 adaptive radiation natural selection accelerates the rate of both speciation and adaption leading to rapid evolutionary diversification, occurs when there are many ecological opportunities available After the KT extinction (extinction of dinosaurs), mammals, birds (from Saurischian dinosaurs), and crocodiles mos...

Bio 171 Exam 3, questions and answers with complete top solutions If a defensive compound is always present in an organism, then it must be a constitutive defense. false LECTURE 15 adaptive radiation natural selection accelerates the rate of both speciation and adaption leading to rapid evolutionary diversification, occurs when there are many ecological opportunities available After the KT extinction (extinction of dinosaurs), mammals, birds (from Saurischian dinosaurs), and crocodile...