This lab explores three common cancers. an additional form of cancer – skin cancer – used to be seen only in older individuals but is now seen in younger individuals, many in their early 20s. skin cancer results from accumulated mutations to the dna of skin cells, caused primarily by sun exposure. what factors do you think may be contributing to the increase in skin cancer among young adults?

Due to pollution the ozone layer of the Earth is being more and more affected. The main function of ozone is to absorb the Sun's UV radiation. Exposure to UV radiation is known to increase the risk of skin cancers.

Thus, young adults could get higher levels of UV radiation from the sun  compared with their grandparents, due to pollution.

Increased sun exposure may also be another cause. Today, it is more and more popular to spend a lot of time at the beach. Traveling to other countries to do this is more accessible today for young adults.

However, tanning beds which are very popular with young people, are another source of high levels of UV radiation.

≅200-130 milions years ago pangea splited in 2 continents

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in