Ch. 15 notes
... Members of each species vary from one another in important ways. In Darwin’s day, variations were thought to be unimportant, minor defects. Darwin argued that this variation mattered. Darwin noted that plant and animal breeders would breed only the largest hogs, the fastest horses, or the cows that ...
... Members of each species vary from one another in important ways. In Darwin’s day, variations were thought to be unimportant, minor defects. Darwin argued that this variation mattered. Darwin noted that plant and animal breeders would breed only the largest hogs, the fastest horses, or the cows that ...
2-3-16 Evolution Outline Packet 1
... B. Embryological Homologies are seen as common stages of development that embryos go through. (Darwin wrote about these in his book too.) C. Molecular Homologies - refers to DNA nucleotide sequences being exact in order and function. (Darwin could not write about these, as they had not been discover ...
... B. Embryological Homologies are seen as common stages of development that embryos go through. (Darwin wrote about these in his book too.) C. Molecular Homologies - refers to DNA nucleotide sequences being exact in order and function. (Darwin could not write about these, as they had not been discover ...
Lecture 11: Phylogenetic tree inference: introduction Evolution
... The observed taxonomic units (OTUs) are the ones that we actually have access to measure them. They are placed at the leaves of the phylogeny. They are the only ones we can call real. We fill in the internal nodes of the phylogeny with hypothetical taxonomic units (HTUs); imaginary ancestors whose p ...
... The observed taxonomic units (OTUs) are the ones that we actually have access to measure them. They are placed at the leaves of the phylogeny. They are the only ones we can call real. We fill in the internal nodes of the phylogeny with hypothetical taxonomic units (HTUs); imaginary ancestors whose p ...
Unit 7: Change in Organisms Over Time
... and /or modern day species reveal links between groups. Caudipteryx is between dinosaurs and birds. This Chinese fossil shows some dinosaurs had feathers on arms, tail and probably body. Advantages during running and escape gave rise to birds once lift-off occurred. Eustheopteron is an amphi ...
... and /or modern day species reveal links between groups. Caudipteryx is between dinosaurs and birds. This Chinese fossil shows some dinosaurs had feathers on arms, tail and probably body. Advantages during running and escape gave rise to birds once lift-off occurred. Eustheopteron is an amphi ...
EVOLUTION UNIT 7A Part 1 of 2
... Galapagos Islands, off coast of South America • If an ocean separated islands, it isolated 2 populations of a single species. The populations could diverge more and more in appearance as each adapted to local environmental conditions. • After many generations, 2 populations could become dissimilar e ...
... Galapagos Islands, off coast of South America • If an ocean separated islands, it isolated 2 populations of a single species. The populations could diverge more and more in appearance as each adapted to local environmental conditions. • After many generations, 2 populations could become dissimilar e ...
The Molecular Connection: DNA Evidence for Evolution
... 9) Conclude – “Organisms with fewer shared traits also have _________ (less / more) ...
... 9) Conclude – “Organisms with fewer shared traits also have _________ (less / more) ...
Note Sheets
... Individuals with traits that are ________________________________to their environment are more likely to ________________________________________________, passing these traits on to their offspring ...
... Individuals with traits that are ________________________________to their environment are more likely to ________________________________________________, passing these traits on to their offspring ...
Evolution - Effingham County Schools
... later nearly all the grasshoppers were dead. A few, however, survived. Each year he continues to spray his fields with the insecticide, but fewer and fewer of the grasshoppers die. Which of the following best explains the results? A. The insecticide caused a mutation in the species. B. The grasshopp ...
... later nearly all the grasshoppers were dead. A few, however, survived. Each year he continues to spray his fields with the insecticide, but fewer and fewer of the grasshoppers die. Which of the following best explains the results? A. The insecticide caused a mutation in the species. B. The grasshopp ...
A. Historical Context for Evolutionary Theory
... Closely related species, the twigs of the tree, shared the same line of descent until their recent divergence from a common ancestor. ...
... Closely related species, the twigs of the tree, shared the same line of descent until their recent divergence from a common ancestor. ...
The Major Transitions in Evolution
... • They are able to exlude agrammatical forms • Centre-embedding is not uniquely human? ...
... • They are able to exlude agrammatical forms • Centre-embedding is not uniquely human? ...
cladogram activity (1)
... A cladogram is a diagram based upon similar traits found in organisms. Cladograms show evolutionary relationships among groups of organisms. Scientists use the fossil record, structural, and molecular comparisons (DNA & RNA) to construct cladograms. Organisms that are located in close proximity to o ...
... A cladogram is a diagram based upon similar traits found in organisms. Cladograms show evolutionary relationships among groups of organisms. Scientists use the fossil record, structural, and molecular comparisons (DNA & RNA) to construct cladograms. Organisms that are located in close proximity to o ...
Evolution misconceptions
... the world and all life on it was created in six literal days); however, most religious groups have no conflict with the theory of evolution or other scientific findings. ...
... the world and all life on it was created in six literal days); however, most religious groups have no conflict with the theory of evolution or other scientific findings. ...
Natural Selection
... Darwin’s Focus on Adaptation In reassessing his observations, Darwin perceived adaptation to the environment and the origin of new species as closely related processes § Coined the term “descent with modification” to describe his hypothesis for perceived similarities and differences between speci ...
... Darwin’s Focus on Adaptation In reassessing his observations, Darwin perceived adaptation to the environment and the origin of new species as closely related processes § Coined the term “descent with modification” to describe his hypothesis for perceived similarities and differences between speci ...
Darwin and Evolutionary Theory
... contradict the idea that species gradually change • He instead proposed the idea of catastrophism the idea that every time species changes have occurred, there has been a drought, flood, fire, etc. ...
... contradict the idea that species gradually change • He instead proposed the idea of catastrophism the idea that every time species changes have occurred, there has been a drought, flood, fire, etc. ...
Lecture III
... Usually, but not always, correlated – e.g., hummingbirds go torpid on cold nights & can freeze to death. Mammals and birds maintain roughly constant body temperatures over a wide range of ambient or environmental temperatures, TA. Top. Within the so-called "thermo-neutral region” (TA bounded by lo ...
... Usually, but not always, correlated – e.g., hummingbirds go torpid on cold nights & can freeze to death. Mammals and birds maintain roughly constant body temperatures over a wide range of ambient or environmental temperatures, TA. Top. Within the so-called "thermo-neutral region” (TA bounded by lo ...
Evidence for Evolution
... survive and reproduce leads to a gradual change in a population, with favorable characteristics accumulating over ...
... survive and reproduce leads to a gradual change in a population, with favorable characteristics accumulating over ...
Evolution and symbiogenesis
... Evolution occurs due to the long-term, stable symbiotic association of two unrelated organisms, and or their genomes. • These associations lead to abrupt evolutionary novelty. ...
... Evolution occurs due to the long-term, stable symbiotic association of two unrelated organisms, and or their genomes. • These associations lead to abrupt evolutionary novelty. ...
Ch15 Slides - Mrs. Brenner`s Biology
... Fossils are the remains and traces of past life or any other direct evidence of past life such as trails, footprints, or preserved droppings Fossils record the history of life from the past Document a succession of life forms from the simple to the more complex Sometimes the fossil record is ...
... Fossils are the remains and traces of past life or any other direct evidence of past life such as trails, footprints, or preserved droppings Fossils record the history of life from the past Document a succession of life forms from the simple to the more complex Sometimes the fossil record is ...
Systematics and phylogeny
... – Bacteria-----whales----sequoia trees • Biologists group organisms based on shared characteristics Taxonomy • Field of biology concerned with identifying and naming • Binomial system devised by Linnaeus • Classification is how species and higher groups are placed into the taxonomic hierarchy System ...
... – Bacteria-----whales----sequoia trees • Biologists group organisms based on shared characteristics Taxonomy • Field of biology concerned with identifying and naming • Binomial system devised by Linnaeus • Classification is how species and higher groups are placed into the taxonomic hierarchy System ...
evolution Darwin Carolus Linnaeus
... from a common ancestor that reached Kauai over 5 million years ago. ago. ...
... from a common ancestor that reached Kauai over 5 million years ago. ago. ...
Charles Darwin - District 196 e
... For many years, Darwin led a double life. Publicly, he studied things such as barnacles and cross-pollination of plants. He published books about data he had collected on the HMS Beagle. He received many awards and honors and belonged to many important scientific societies. Privately, he worked on h ...
... For many years, Darwin led a double life. Publicly, he studied things such as barnacles and cross-pollination of plants. He published books about data he had collected on the HMS Beagle. He received many awards and honors and belonged to many important scientific societies. Privately, he worked on h ...
Transitional fossil
A transitional fossil is any fossilized remains of a life form that exhibits traits common to both an ancestral group and its derived descendant group. This is especially important where the descendant group is sharply differentiated by gross anatomy and mode of living from the ancestral group. These fossils serve as a reminder that taxonomic divisions are human constructs that have been imposed in hindsight on a continuum of variation. Because of the incompleteness of the fossil record, there is usually no way to know exactly how close a transitional fossil is to the point of divergence. Therefore, it cannot be assumed that transitional fossils are direct ancestors of more recent groups, though they are frequently used as models for such ancestors.In 1859, when Charles Darwin's On the Origin of Species was first published, the fossil record was poorly known. Darwin described the perceived lack of transitional fossils as, ""...the most obvious and gravest objection which can be urged against my theory,"" but explained it by relating it to the extreme imperfection of the geological record. He noted the limited collections available at that time, but described the available information as showing patterns that followed from his theory of descent with modification through natural selection. Indeed, Archaeopteryx was discovered just two years later, in 1861, and represents a classic transitional form between dinosaurs and birds. Many more transitional fossils have been discovered since then, and there is now abundant evidence of how all classes of vertebrates are related, much of it in the form of transitional fossils. Specific examples include humans and other primates, tetrapods and fish, and birds and dinosaurs.The term ""missing link"" has been used extensively in popular writings on human evolution to refer to a perceived gap in the hominid evolutionary record. It is most commonly used to refer to any new transitional fossil finds. Scientists, however, do not use the term, as it refers to a pre-evolutionary view of nature.