Alightweight material is being tested for effectiveness in blocking ultraviolet (uv) rays from the sun that cause skin to burn and possibly develop skin cancer. which method would be most for testing this material? a. use specialized equipment to measure how much uv light passes through stacks of one, five, or 20 layers of the material. b. test the material in controlled natural settings by using natural uv light, and measure the uv light that passes through. c. write a survey that asks people on beaches about their preferences for sunscreen and protective materials. d. test the material in a lab setting by using humans and a variety of uv light sources, and develop a scale to measure the damage that is caused to human skin.

The correct answer would be option B.

Explanation:

Ultraviolet rays or Uv rays are radiations from the sun. Such radiations have a bad impact on skin, they can cause mutation and make it carcinogenic or simply burn the skin.

The lightweight material can be tested in a controlled natural setting by placing in two samples one without lightweight material and other with it and measure result in the natural UV light than measure in UV light that passes through.

Analyzing the test result would help in testing the material if it is effective with UV rays or not

Thus, the correct answer would be option B.

answer: b: experiments that showed that all cells are similar in how they metabolize and in their composition

explanation:

lesson summarykaryotypes a genome is the full set of all the genetic information that an organism carries in its dna. chromosomes arebundles of dna and protein found in the nucleus of a eukaryotic cell.