Without variation natural selection would have nothing to select from that would confer survivability and reproductive success. on the organisms being selected against the organisms conspecifics and the immediate environment.
Mutation and sexual recombination provide the main sources of this variation that is needed to make selection work. Mutation is the variation presented that causes the real adaptive change that can lead to speciation.
Without genetic variation, natural selection would not be possible. If we were all genetically identical, natural selection would have nothing to favour, because everyone is the same.
the earth interior
Coal, oil, natural gas, uranium, and geothermal
this is important to be her formula is correct.
ADAPTATION- It is the change in the physical appearance and/or the physiological characteristics of an organism upon exposure to different conditions of environment generally the harsher ones ( such as temperature, radiations and the nutrient sources ) . Gradually the immune system of an organism gets acquainted to the new environment and hence it is said to be adapted.VARIATION- The transmittance of the adaptation to off springs results in new family of a species known as variants . The phenomenon of the generation of a new variant of a species is known as variation .ADAPTATION is the source of VARIATION.For examples if you look at the various breeds of canines ( dogs) in the world, they vary though they belong to the same species , this is because of their adaptation to the different prevailing climatic conditions.The transfer of adapted features such as longer furs (canines in cold climates) and the modified hooked beaks in birds is due to the transfer of adapted traits from the parents to off springs through the vehicles of heredity known as DNA .The passing on of the adapted traits to the off springs i.e. variation over an observed period is called as the EVOLUTION of a new variety or EVOLUTION .
Because in natural selection heritable traits will be passed down allowing those species to have a better chance at survival, thus making speciation a reality.
No, mutation and sexual recombination are the sources of variation and natural selection selects from those variations presented to it against the immediate environment.
genetic variation (from any of several sources) provides options to try.natural selection determines which of those options help the population most.
The main source of genetic variation is a large population with a large gene pool.
Natural and Artificial Selection
I don't know about Wallace, but Darwin spent a lot of his time in the Galapagos Islands where he saw what he thought was natural selection in action without interference from, or as a response to, outside sources like mankind.
Mutation and sexual recombination.
Exhaustible sources are natural resources that can be depleted over time, such as fossil fuels (oil, coal, natural gas) and minerals. These sources are finite and not easily replenished at the rate they are consumed, leading to potential scarcity and environmental impacts when exhausted. It is important to find alternative, sustainable sources of energy to reduce reliance on exhaustible sources.
Genetic variation is a direct results of many sources of genetic material and their unconstrained interaction. The larger the population and the fewer restrictions on how they can be integrated the more diverse the genetic variation. This allows for better natural selection and also reduced the ability of disease from affecting the entire population. The founder effect describes genetic variation in communities established by few people. Inbreeding in small closed communities leads to abundances of recessive ailments. This can be seen in hereditary royal families and closed remote communities.
The two main sources of genetic variation are sexual reproduction, and mutation. Sexual reproduction is more common.
The most important source of variability in bacteria is mutation.
· To protect against harmful by-products of major sources of energy · To preserve many of the natural resources that we currently use as sources of energy
There three main natural sources of hydrocarbons: natural gas, petroleum and coal.