21.As mentioned in the video, the environment can also affect an organism's traits. The example of nourishment was used in the case for Spike, as this could affect his growth and size. This can also occur in humans. UV light was not mentioned in the video. How could UV light potentially affect an organism's trait? Provide one example.

UV light can modify the DNA of a human being, provoking mutations that affect the traits. For example, exposure to the sun's UV rays affects the DNA of the skin cells, causing mutations that can lead to cancer.

Explanation:

An environmental factor that can affect humans traits is the exposure to UV light that the sun radiates. The DNA in our skin cells absorbs the UV rays. As a result, the DNA can suffer modifications that result in skin cancer. Also, the absorption of UV rays causes wrinkles since cell components are affected due to the accumulation of UV light.

UV light can modify the DNA of a human being, provoking mutations that affect the traits. For example, exposure to the sun's UV rays affects the DNA of the skin cells, causing mutations that can lead to cancer.

Explanation: An environmental factor that can affect humans traits is the exposure to UV light that the sun radiates. The DNA in our skin cells absorbs the UV rays. As a result, the DNA can suffer modifications that result in skin cancer. Also, the absorption of UV rays causes wrinkles since cell components are affected due to the accumulation of UV light.

The MAX Orange Line is a light rail service in Portland, Oregon, United States, operated by TriMet as part of the MAX Light Rail system. It connects Portland City Center to Portland State University, Southeast Portland, Milwaukie, and Oak Grove.

Explanation:

The Portland–Milwaukie Light Rail Project was the second and final phase of the South Corridor Project that in its first phase expanded light rail services to Interstate 205 and the Portland Transit Mall. The extension, which followed years of failed light rail plans for Clackamas County, began construction work in mid-2011. As part of the project, TriMet built Tilikum Crossing (pictured), billed as "the largest car-free bridge in the United States", over the Willamette River. The extension opened to Orange Line service on September 12, 2015. The line serves 17 stations and runs for 201⁄2 hours daily with a minimum headway of 15 minutes during