Read the following information from a material safety data sheet (msds) about the chemical hydrochloric acid (hcl). “skin contact: in case of contact, immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. wash clothing before reuse. thoroughly clean shoes before reuse. get medical attention immediately.” based on this information, which is the most important thing to do right away if a student spills hcl on his shirt? a. remove the shirt and rinse the skin with water in case the hcl soaked through. b. remove the shirt, and find a sink to rinse it in. c. get from a classmate immediately. d. call 911 to get medical attention immediately.

Which of the following scenarios is an example of the bottleneck effect? answers a in south africa, much of the afrikaner population is descended from a small number of dutch colonists. in this population, this is an unusually high frequency of pseudoxanthoma elasticum (pxe), an elastic tissue disorder. b four white-tailed deer are introduced to a park in finland. thirty years after their introduction scientists compare the genes in the population and find that there is no variation. c during the industrial revolution, london's air became filled with soot. as a result, birds started eating more of the lighter moths because they were easier to spot than their darker counterparts. over time, the moth population changed so that there were more darker moths than lighter ones. d 10% of the population of american alligators in an area have the recessive trait albinism. a massive flood results in the death of 80% of the population. of the remaining population, 60% have the recessive trait of albinism.