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good question. variations must occur in evolution because its what evolution is about. listen to the story to understand:
once upon an evolution, there were these prehistoric horse-like animals. they lived in a valley. when the grass they ate started to die off, many died. even though they had little food, some survived. some of them had genes that gave them long necks. because of this, they were able to reach the food in the trees. only specimens with long necks survived, and these genes were passed on to their posterity.
now, if all these animals had been the same, they would have all died of and gone extinct. but because of that gene, that genetic mutation, some lived and became giraffes. withot variation, it would have simply been a mass extinction.
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∙ 13y ago
Wiki User
∙ 12y agocus i dont know
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How does natural variation affect evolution?
Natural selection (the driving force of evolution) is the selection of genetic variations by how they effect the organism's chances of survival or reproduction. If they diminish it's chances, the organism or it's immediate offspring die and the gene is gone. If the genetic variations increase it's chances, then it survives. Without genetic variations there can be no evolution. Natural selection is the selection (by environmental pressures) of those variations.
Why is variation important to survival of a species?
Hats off to Sir Charles Darwin for his theory of evolution! Variations are very important to species. Some of the variations are more suitable for the species to survive. You get new species with time by selection of the better ones.
In order for evolution by natural selection to occur what has to happen?
There must be genetic variation, the variation must be heritable, and there must be differential reproduction (due to competition).
Which early sociologist applied the concept of evolution to societies in order to explain how they change or evolve over time?
Herbert Spencer was the early sociologist who applied the concept of evolution to societies.
Are mutations predictable?
No, they are random, This means that they occur in no set numerical order. So, though they can not be predicted it is certain, with the mistakes made in replication and other factors, that they will occur.
How does variation work to help cause evolution?
You have to have variation in order to be able to have more successful variations, which succeed in evolutionary terms, and less successful variations which fail. If there were no variation in a species, there would be no natural selection.
What are the conditions that must be present in order for each process to occur?
poo on bread
How does natural variation affect evolution?
Natural selection (the driving force of evolution) is the selection of genetic variations by how they effect the organism's chances of survival or reproduction. If they diminish it's chances, the organism or it's immediate offspring die and the gene is gone. If the genetic variations increase it's chances, then it survives. Without genetic variations there can be no evolution. Natural selection is the selection (by environmental pressures) of those variations.
Why might scientist study evolution?
A scientist may study evolution in order to understand current species of organisms, and what the future of said species may be. Evolution is a direct gateway from the past to the present allowing scientists to understand everything from genetic structures - to geographic activity.
What gas must be present for the aerobic breakdown of glucose to occur?
Oxygen, the final electron acceptor in aerobic respiration.
Is glucose a reactant in respiration?
Glucose must be present in order for cellular respiration to occur. Cellular respiration is the process in which glucose is broken down in to ATP (energy), Carbon Dioxide, and water. Glucose is a reactant in the sense that it must be present for the reaction to occur.
What pigment is needed to carry out the chemical reactions of photosynthesis?
chlorophyl and also carotenoids, xanthophyls..
What are the steps of stellar evolution in order?
You can find an overview of stelar evolution in the Wikipedia article entitled "Stellar evolution".
What must happen in order for evolution to exist?
Without heredity what use would there be to selection and why evolution? Just take beneficial mutations in the germ line for example. No heredity and nothing to enter the populations gene pool and no evolution. No heredity and there would be no variation in populations and the first environmental challenge would carry your population to extinction.
What is the theoretical justification for Net Present Value decision rules?
These are important when you are investing. It is used in order to determine the risk that might occur during an investment.
What molecules must be present in order for energy production to occur in the mitochondria of an animal cell?
Oxygen and glucose are the raw materials. Enzymes guides the process
Which organelles have to be present in a plants leaf in order for photosynthesis to occur?
The chloroplast is the main component/organelle in the process of photosynthesis. Also this organelle is unique to plant cells.
