The correct answer is: B. A person spends one hour each day under the ultraviolet rays of a tanning bed.
The relationships between ultraviolet (UV) light and skin cancer are highly positive because it has been shown that indoor tanning bed use represents an avoidable risk factor for melanoma and non-melanoma skin cancer. UV light is a form of radiation that causes mutations in DNA by causing the chemical changes that alter the shape of the DNA. So, UV light is a potent mutagen and thus, tanning bed (source of UV light) can cause damage to the DNA in the surface layer of your skin after repeated or prolonged exposure. This might increase the risk for skin cancer.
A squirrel stores food in a tree hole.
Grain roundness goes to grain size , sediment sorting goes to loss of edges ,layering goes to stratification of sediments and rocks , texture range of particle size . hope this right!
Answer AND Explanation:
In the process of succession, the species in an area will gradually change. Each species is adapted to survive and competes with other species under specific sets of environmental conditions. If these conditions change, then the existing species will be replaced by a new set of species which are better adapted to the new conditions that have evolved.
This process helps an ecological community to undergo a predictable change following the initial colonisation of a new habitat. The succession that occurs in new habitat uninfluenced by pre existing succession is called primary succession, where as succession that follows disruption of a pre existing community is called secondary succession.
DNA isn't really copied, it's more so split into 2 parts.
DNA is split into 2 parts during mitosis, more exactly the 5th stage called anaphase. chromosomes, which hold DNA< are split into 2 (genetically identical) groups, and each respective group goes to one spindle or another, readying for the last phase of mitosis and eventually cytokinesis.
