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What else can I help you with?
How do cladogenesis and anagenesis differ in terms of evolutionary processes and outcomes?
Cladogenesis and anagenesis are two different modes of evolution. Cladogenesis occurs when a single species splits into two or more distinct species, leading to increased biodiversity. Anagenesis, on the other hand, involves gradual changes within a single species over time, without branching into new species. In terms of outcomes, cladogenesis results in the formation of new species, while anagenesis leads to evolutionary changes within a single lineage.
What is a Morphological Rate?
Rate of change of morphological traits, typically measured by quantitative measures - Changes in disparity over time.
A speciation pattern which exhibits branching of populations is termed?
Adaptive radiation. This process occurs when a single ancestor species evolves into a wide array of descendant species to adapt to different ecological niches. It results in a tree-like pattern of branching populations.
What are 3 types of macroevolution?
Anagenesis: Evolution within a single lineage over time, leading to changes in the characteristics of the entire population. Cladogenesis: The splitting of one species into two or more distinct species, usually through geographic isolation or other barriers. Extinction: The complete elimination of a species, typically due to environmental changes or competition with other species.
What is phyletic speciation?
Divergence
If evolution is real why are there still monkeys?
Evolution is the change in populations, not in individuals.Evolution is not a process in which species universally progress up a "ladder".Humans are not descended from any modern species of monkey; both monkeys and humans are descended from some long-extinct ancestor pre-dating both. Although this species, if it were transferred to today, would be considered a "monkey", it is not any living species of monkey.Evolution explains how humans developed from a primate ancestor, but not an extant species of monkey or ape. (Modern primates include: bonobos, chimpanzees, gorillas, baboons, macaques, lemurs, gibbons, and humans. None of these is a descendant of any other.)Speciation can occur by branching into two or more reproductively isolated populations (cladogenesis) or when a single population changes over time to such an extent that the later population is considered a different species (anagenesis).
Is the velociraptor a reptile?
Yes. Velociraptor was very bird like. If you were to see a live one your first impression would probably be of a very odd bird. It was covered in feathers that left its arms looking like wings and was probably warm blooded.
What is one way new species form?
First, you must a have a population of the same species. They must split so that they cannot cross-breed, this can happen by an island or a canyon range. Then, through many generations mutations, genetic drift, gene flow, natural selection and bottleneck effect comes a new species.
How is adaptive radiation different from divergent evolution?
I think it is Puncuated Equilibrium. I am not sure.No Punctuated Evolution is a period of stasis where no changes occur followed by sudden rapid change.It is Divergent
What other theory of evolution is there?
There are quite a few. I'll give a quick summary of the ones I know, but for a better understanding of them, I'd look them up yourself. Punctuated Equilibrium - Theory created by Niles Eldredge and Stephen Jay Gould. The theory explores how species do not change much over a long period called "Stasis" (roughly 3 million years). "Cladogenesis" is the occurrence of a species splitting, resulting in new species. Change only happens when there is a significant change in their environment. Changes are rapid, not gradual. Fossil records support this theory. Alfred Wallace was the co-founder of Evolution though Natural Selection (Darwin's theory). Darwin was just published first. The theory is very similar to Darwin's but one of the main differences was that Wallace believed that complexity is evidence of design. Jean Baptiste Lamarck developed a theory which people now refer to as Lamarckism. This theory says that all life started out simple but gradually changed due to what part of the body the organisms used. Darwin's theory, Evolution by Natural Election - genetic change through sexual reproduction or competition. (Darwin didn't use "Survival of the fittest") Most changes are gradual. Theodosius Dobzhansky developed the Synthetic Theory. This I believe was developed using a mix of theories. There are many other theories but you'll need to do some investigation.
How can mutations over millions of years lead to new species?
Mutations lead to all sorts of variation in organisms and natural selection selects the best able to adapt to the immediate environment by becoming reproductively successful. Thus alleles change over time in populations of organisms and evolution occurs. One; anagenesis. Where a species just evolves so much that it becomes another species. ( rare and controversial ) Cladogenesis. Where species are split asunder by physical or behavioral reasons and split into two different species.
Where did the horse come from?
In the 1870's, the paleontologist O.C. Marsh published a description of newly discovered horse fossils from North America. At the time, very few transitional fossils were known, apart from Archeopteryx. The sequence of horse fossils that Marsh described (and that T.H. Huxley popularized) was a striking example of evolution taking place in a single lineage. Here, one could see the fossil species "Eohippus" transformed into an almost totally different-looking (and very familiar) descendent, Equus, through a series of clear intermediates. Biologists and interested laypeople were justifiably excited. Some years later, the American Museum of Natural History assembled a famous exhibit of these fossil horses, designed to show gradual evolution from "Eohippus" (now called Hyracotherium) to modern Equus. Such exhibits focussed attention on the horse family not only as evidence for evolution per se, but also specifically as a model of gradual, straight-line evolution, with Equusbeing the "goal" of equine evolution. This story of the horse family was soon included in all biology textbooks. As new fossils were discovered, though, it became clear that the old model of horse evolution was a serious oversimplification. The ancestors of the modern horse were roughly what that series showed, and were clear evidence that evolution had occurred. But it was misleading to portray horse evolution in that smooth straight line, for two reasons: # First, horse evolution didn't proceed in a straight line. We now know of many other branches of horse evolution. Our familiar Equus is merely one twig on a once-flourishing bush of equine species. We only have the illusion of straight-line evolution because Equus is the only twig that survived. (See Gould's essay "Life's Little Joke" in Bully for Brontosaurus for more on this topic.) # Second, horse evolution was not smooth and gradual. Different traits evolved at different rates, didn't always evolve together, and occasionally reversed "direction". Also, horse species did not always come into being by gradual transformation ("anagenesis") of their ancestors; instead, sometimes new species "split off" from ancestors ("cladogenesis") and then co-existed with those ancestors for some time. Some species arose gradually, others suddenly. Overall, the horse family demonstrates the diversity of evolutionary mechanisms, and it would be misleading -- and would be a real pity -- to reduce it to an oversimplified straight-line diagram. With this in mind, I'll take you through a tour of the major genera of the horse family, Equidae. CAUTION: I will place emphasis on those genera that led to the modern Equus. Do not be misled into thinking that Equus was the target of evolution! Bear in mind that there are other major branches of the horse tree that I will mention only in passing. (See the horse tree for a lovely ASCII depiction.) Small preface: All equids (members of the family Equidae) are perissodactyls -- members of the order of hoofed animals that bear their weight on the central 3rd toe. (Other perissodactyls are tapirs and rhinos, and possibly hyraxes.) The most modern equids (descendents of Parahippus) are called "equines". Strictly speaking, only the very modern genus Equus contains "horses", but I will call all equids "horses" rather indiscriminately. Most horse species, including all the ancestors of Equus, arose in North America. visit http://www.talkorigins.org/faqs/horses/horse_evol.html for more info
