How do helpful variations accumulate in a species?
Helpful variations accumulate through natural selection, as the organisms that are better adapted th their environment reproduce offspring with the same variations.
What is a variation within a species?
Variation, in biology, any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences (genotypic variation) or by the effect of environmental factors on the expression of the genetic potentials (phenotypic variation).
Why is there a variation within species?
Genetic variation within a species can result from a few different sources. Mutations, the changes in the sequences of genes in DNA, are one source of genetic variation. Finally, genetic variation can be a result of sexual reproduction, which leads to the creation of new combinations of genes.
Why do species overproduce or create a lot of offspring?
In all species, overproduction helps to improve the genetic line by supporting survival of the fittest. Since resources are limited, those offspring that are the strongest or best able to adapt to environment challenges are able to survive.
How does genetic variation occur in a species?
Genetic variation within a species can result from a few different sources. Mutations, the changes in the sequences of genes in DNA, are one source of genetic variation. Another source is gene flow, or the movement of genes between different groups of organisms.
What makes an organism better suited to its environment?
Any variations that makes an organism better suited to its environment Adaptation Process by which one species changes to a new species Gradualism 1. A is a group of organisms that share similar characteristics and can reproduce among themselves. Species
How did finches contribute to the theory of evolution?
Finches changes inherited characteristics of a species over time. Evolution Darwin’s hypothesis became known as the theory of evolution by – organisms with traits suited to their environment will more likely survive and reproduce. Natural selection
Why are moths of the same species more likely to reproduce?
An example would be moths of the same species with different color wings. Moths with wings similar to the color of tree bark are better able to camouflage themselves than moths of a different color. As a result, the tree-colored moths are more likely to survive, reproduce, and pass on their genes.