what is the variety of life found on Earth and the variations within species is called
Sexual reproduction
Variations occurs in species due to the process of "Crossing over"
how variations occur within a species
There are 5 different species of cardinal. Within those different species, there are also different variations, such as their coloring, and how they differ from the others.
sexual reproduction is the major cause of variations within a specie
Meiosis takes place in sexual reproduction and genetic variations takes place in sexual reproduction. Genetic variations lead to evolution to new species.
Because there is variation within a species, it is therefore possible for the law of natural selection to operate, by selecting those variations which best enhance survival and reproduction.
the range of organisms present in a particular ecological community or system. It can be measured by the numbers and types of different species, or the genetic variations within and between species.
Variations
Adaptation: The ability to adjust to changing environmental conditions. Diversity: The range of different species and genetic variations within an ecosystem. Evolution: The process of natural selection and genetic change over time that leads to species' adaptation to their environment.
Genetic diversity refers to the variety of genetic material within a species or population. It includes different gene variations and DNA sequences present within individuals of the same species. Genetic diversity is important for a species' ability to adapt to changing environments and for the overall health and resilience of the population.