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What is the name of the hypothesis that evolution occurs at a slow constant rate?
Darwin's classic theory of evolution assumed that evolution is a slow, contunuous process, by which new species evolve and emerge. This is referred to at times as "organic evolution" and the "synthetic theory of evolution", or just the Darwinian theory of evolution. A newer theory, proposed originally by Niles Eldridge and Stephen Jay Gould is known as "punctuated equilibria", a model in which the evloution of new species occurs only periodically, in relatively rapid spurts. See "Time Frames the Rethinking of Darwinian Evolution and the Theory of Punctuated Equilibraia, Simon & Schuster, 1985" The slow, constant process has also been called "gradualism."
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This is the concept of gradualism.
Name three characteristics of mitochondria and chloroplats that support the endosymbiotic hypothesis of eukaryotic evolution?
There are three characteristics of mitochondria and chloroplasts that support this theory. First, both mitochondria and chloroplasts have two membranes surrounding them. S…econd, like prokaryotes, mitochondria and chloroplasts contain ribosomes, as well as a circular DNA molecules attached to their inner membranes. Third, mitochondria and chloroplasts are autonomous.
Concept called gradualism. Not hypothesis, as it has been tested and confirmed, especially among the " little shellies. "
a hypothesis doesn't occur... a hypothesis is an educated guess, basically what you think is going to happen based on solid data or just a hunch if you really don't know...
In science, a hypothesis and a theory differs in that a hypothesis is a conjecture based on empirical observation or theoretical derivation yet unproven or by any experimental… work, and that a theory is a hypothesis that has been rigorously tested by many researchers and supported by strong evidence. Evolution is a theory that has been repeatedly tested, supported by overwhelming evidence, and can be used to explain natural phenomenon very well.
Gradualism. I would not call it a hypothesis though. It is part of the new synthesis theory of evolutionary biology.
This is the concept of gradualism.
That evolution occurs through the use and disuse of physical features by individual members of a species.
Evolution is the change in frequency of the alleles in a gene pool over time; evolution is when a population of species gets more suited to its environment over time. Evolutio…n occurs with mutations and natural selection. What happens is that in a population of species, not all of them are the same. For example, there is a whole colony of fish in a pond. Some of the fish are faster than the others. They reproduce and pass on their genes - these genes make their offspring fast as well. The other fish that aren't as fast, die out because they are not fast enough. The fast fish soon become more common, making the species as a whole faster. This occurs in several stages, where the slowest fish are removed each time, and the faster ones reproduce more often. Gradually, the fish get faster and faster as a group. The second aspect is that these fish will often have differences in their genetic codes, called mutations. While bad mutations will normally result in fatality and not get passed on, some are useful and result in increased survival. When these mutations build up, the species we previously had may then become completely different from what is here now; the two groups cannot crossbreed, and have become different species.
Evolution is always occuring, it doesn't just happen. However, in humans, it is unlikely to happen, as too few people die for humans to be prone to natural selection. What… happens, is that certain members of a gene pool will be unable to live in it's environment. Then, they die, and only the individuals fit for the environment mate. This means that only the better survival traits in a species are passed onto the young. These traits come from mutation, and mutation is what makes a gene pool able to have variety. Other ways gene pools get variety is through interbreeding, immigration/emigration. The best parts of this variety survive, whereas the lesser traits die. That's why there are still monkeys in jungles, because their traits suit the jungle, whereas our traits suit flatland. Now, our traits suit the environment we create. Because we create our environment, it is less likely for humans to die. However, this works slowly, over many generations. Humans no longer need to fit our environment, however, because less people die of obesity, and mutations in human genes that can benefit us are few and far between. Humans don't often die just because of the environment, so evolution is unlikely to happen, in the near future, anyway.
The heterotroph hypothesis and evolution are both theories that life began from smaller organisms and transformed and grew into what life is now. Reference: ChaCha.com
In Animal Life
Evolution is defined as changes in allele frequencies from one generation to the next. Therefore, anything that affects allelic frequencies in a population in fact causes evol…ution. Biological organisms - all of them - reproduce with genetic variation. Every new birth causes the tiniest shift in the number of times an allele occurs in the population. So technically, every new reproduction causes the population to evolve. Evolution happens when reproduction occurs.
The Elastic-Rebound theory explains how earthquakes occur. Rocks on opposite sides of a fault are subjected to force, causing them to shift. They absorb strength which cau…ses them to deform and exceed their internal strength. A sudden movement occurs along the fault and this causes the energy and rocks to go back to their pre-deformed state.