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.

Sarah is sitting at the top of the slide in the schools playground. which will increase sarah’s kinetic energy a- an additional child is added to the top of the slide. b- sarah is pushed and moves down the slide. c- sarah climbs down the ladder and off the slide. d- the ladder is moved to the other side of the yard.

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

Considering the yellow and green pea color phenotypes studied by gregor mendel: a. what is the biochemical function of the protein that is specified by the gene responsible for the pea color phenotype? (1 point) b. a null allele of a gene is an allele that does not specify (or encode) any of the biochemical function that the gene normally provides (in other words, either no protein at all or only non-functional protein is produced from it). of the two alleles, y and y, which is more likely to be a null allele? (1 point) c. in terms of the underlying biochemistry, why is the y allele dominant to the y allele? (2 points) d. why are peas that are yy homozygotes green? (1 point) e. the amount of protein produced from a gene is roughly proportional to the number of functional copies of the gene carried by a cell or individual. what do the phenotypes of yy homozygotes, yy heterozygotes, and yy homozygotes tell us about the amount of sgr enzyme needed to produce a yellow color? explain your reasoning. (2 points)