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... Contrast inorganics such as H2O, O2, CO2, and NH3 with organics Structure and function of: nucleus, plasma membrane,cell wall, mitochondria, vacuoles, chloroplasts, and ribosomes ...
EXPECTATIONS for Do Now
EXPECTATIONS for Do Now

... cell are proteins, carbohydrates, and lipids. Food energy is measured in calories. If one consumes more calories than the body uses, then they will gain weight. ...
Evolution PowerPoint
Evolution PowerPoint

... Ancestry • Explain how the fossil record, anatomical similarities, and/or molecular (DNA) similarities can be used as evidence for the evolutionary development of a given species (e.g., birds, horses, elephants, whales ...
1DarwinianEvolution22_1
1DarwinianEvolution22_1

... evolution differed from Darwin’s. The difference between structures that are homologous and those that are analogous, and how this relates to evolution. The role of adaptations, variation, time, reproductive success, and heritability in evolution. ...
Welcome to Science 3/1
Welcome to Science 3/1

... • Organisms have variations that make them different. • Over time, nature will “select” the organisms with beneficial variations to survive and reproduce. • Over a long, long, time natural selection can lead to evolution. Helpful variations, gradually accumulate in a species, while unfavorable ones ...
BioSem2ExamReview - MrCarlsonsBiologyClass
BioSem2ExamReview - MrCarlsonsBiologyClass

... 8. When studying the history of species over millions and billions of years, we look more at: ...
Biology End of Course Exam Study Guide
Biology End of Course Exam Study Guide

... • Mutation is a change in the DNA sequence- increases genetic diversity.  Gene= section of DNA that codes for a trait (ex. Eye color)  Allele= different form a trait (brown eyes, blue eyes, green eyes)  Traits are formed by proteins that are made from instructions on DNA. • Homozygous refers to t ...
Principles of Biology Lake Tahoe Community College
Principles of Biology Lake Tahoe Community College

... engulfed by a eukaryotic host. 2. Evidence suggests that mitochondria were once free living heterotrophic respiring bacteria that either invaded or were engulfed by a host. Energy allowed increases in size and complexity and activity. 3. Eventually, most DNA merged with nuclear DNA in host. Merging ...
Darwin`s Voyage PPT
Darwin`s Voyage PPT

... Organisms are carried to the islands by ocean currents, drifting on logs; Physical barriers would be how the ocean limits their movement ...
Life Over Time - chapter 6
Life Over Time - chapter 6

... Life Over Time - chapter 6 6.1 Earth has been home to living things for about 3.8 billion years. A. Fossils provide evidence of earlier life. 1. Types of fossils  ex. bones, trilobites 2. Finding the age of fossils  relative dating – comparing fossils  absolute dating – uses radioactive element ...
Section Quiz
Section Quiz

... provided. If it is false, write F. On another sheet of paper, rewrite false statements to make them true. _____ 1. The very hot metal at the center of Earth is in the shape of a cylinder. _____ 2. Earth’s mantle is thinner than Earth’s crust. _____ 3. Magma is soft, nearly molten rock. _____ 4. Eart ...
Comparing Invertebrates
Comparing Invertebrates

... Absorbed nutrients from surrounding water Some had photosynthetic algae living within their tissues Segmented Bilateral symmetry Little cell/internal specialization Little organization back to front May have been related to jellyfish and worms but body plan distinct from anything living today ...
Chapter 15 - Western High School
Chapter 15 - Western High School

... • Individuals in a population show variations among others in the same species • Variations are inherited • Animals have more young than can survive on the available resources • Variations that increase reproductive success will be more common in the next generation ...
evidence for evolution
evidence for evolution

... • Gondwana  supercontinent that existed before Pangae, more than 500 million years ago • Include Southern Hemisphere and India and Arabia • Most modern species live only in places that were once part of Gondwana ...
Big Idea 1 - Amundsen High School
Big Idea 1 - Amundsen High School

... 1) The Earth formed approximately 6.6 billion years ago (bya), and the environment was too hostile for life until 3.9 bya, while the earliest fossil evidence for life dates to 3.4 bya. Taken together, this evidence provides a plausible range of dates when the origin of life could have occurred. 2) C ...
Evolution
Evolution

... (ex. Darwin’s finches) The loss of the ability to interbreed is called reproductive isolation. Sometimes this is caused by changes in reproductive organs such that the offspring will not survive. Sometimes this type of isolation is caused by changes in courtship behavior or the timing of mating cycl ...
Chapter 15 Evolution
Chapter 15 Evolution

... The fossil record offers some of the most significant evidence of evolutionary change.  Fossils provide a record of species that lived long ago.  Fossils show that ancient species share similarities with species that now live on Earth. ...
EVOLUTION - West Windsor-Plainsboro Regional School District
EVOLUTION - West Windsor-Plainsboro Regional School District

... organisms in the population . The changes would not result in the newer organisms being considered as different species. Examples of such microevolutionary changes would include a change in a species’ coloring or ...
Evolution
Evolution

... finch but there were more types. Galápagos finch species varied by nesting site, beak size, and eating habits. Darwin proposed that each bird was descended from the mainland species. ...
evolution ppt
evolution ppt

... finch but there were more types. Galápagos finch species varied by nesting site, beak size, and eating habits. Darwin proposed that each bird was descended from the mainland species. ...
Natural Selection
Natural Selection

... new phenotypes adapted to new conditions. • Natural selection can produce populations that have different structures, live in different niches or habitats from their ancestors. Each successive living species will have descended, with adaptations or other modifications, from previous generations. • M ...


... • Charles Darwin's trip around the Southern Hemisphere aboard the HMS Beagle provided him with evidence that the Earth is very old and that evolution does occur. 4. Indicate whether these statements are true (T) or false (F). a. Darwin had no suitable background to be the naturalist on board the HMS ...
Biology Pre-Learning Check
Biology Pre-Learning Check

... advantage or disadvantage compared to others in surviving and reproducing. The advantaged offspring are more likely to survive and reproduce. Therefore, the proportion of individuals that have advantageous characteristics will increase. When an environment changes, the survival value of some inherit ...
Sample Exam I Key
Sample Exam I Key

... a. inferior, primitive ancestors evolve into superior descendants over time b. animals evolve structures because they need them to survive c. ancestral species branch into new species over generations d. evolution always makes organisms “better” than ancestors e. extinct species become fossils, and ...
Week 2
Week 2

... What patterns can be observed in evolution? What factors influence speciation? Homework: Make sure you have read chapter 15 ...
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Evolutionary history of life



The evolutionary history of life on Earth traces the processes by which living and fossil organisms have evolved since life appeared on the planet, until the present day. Earth formed about 4.5 Ga (billion years ago) and life appeared on its surface within 1 billion years. The similarities between all present-day organisms indicate the presence of a common ancestor from which all known species have diverged through the process of evolution. More than 99 percent of all species, amounting to over five billion species, that ever lived on Earth are estimated to be extinct. Estimates on the number of Earth's current species range from 10 million to 14 million, of which about 1.2 million have been documented and over 86 percent have not yet been described.
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