Simply put, a genetic mutation comes from a change in the DNA; this change can result from an extrachromosomal element, an alteration of the inherited nucleotide...
The basic building block of nucleic acids, such as DNA and RNA. It is an organic compound made up of nitrogenous, a sugar, and a phosphate group (http://www.biology-online.org/dictionary/Nucleotide)
Answer:
A polygenic trait can be described as a physical trait which is influenced by more than one gene.
The three types of selection for a polygenic trait are:
1) Directional Selection: In a directional selection, one of the phenotype is favored in an ecosystem. As a result of this favoring, the allelic frequency changes and shifts in favor of this particular trait.
2) Stabilizing selection: It is a type of natural selection in which the intermediate trait is favored. The population carries a middle trait in abundance.
3) Disruptive Selection: Disruptive trait is a type of natural selection in which the traits on the extreme sides are favored. The intermediate traits are less favored.
The answer is C) Increase genetic variation and breed plants to contain the wild variety.
Answer:
food chain- description 3
energy losses- description 5
pyramid of biomass- description 1
pyramid of numbers- description 4
energy flow- description 2
<span>The word promixodistal comes from Latin terms meaning "away from the center". This refers to the stage of development where growth occurs from the center of the body to the extremities. For example, an infant learns to use its arms and legs first (to crawl), then its hands (to reach and grasp), and finally its fingers (to pick up and use objects).</span>
