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Additional Skills and Processes Maritime Science Practice

Additional Skills and Processes Maritime Science Practice. Retrieved from HSA Public Release Items.

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Additional Skills and Processes Maritime Science Practice

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  1. Additional Skills and ProcessesMaritime Science Practice Retrieved from HSA Public Release Items

  2. Rafael was given an assignment to determine how the appearance of frog blood cells change when they are placed in distilled water. He is using an incorrect setup to perform his investigation. His laboratory setup is shown in the figure. Critique Rafael's setup shown in the figure. In your response, be sure to include • any unsafe laboratory equipment and procedures shown in the figure • a description of the materials and safe setup for the correct investigation • an explanation of why it is important to follow the correct procedures in the laboratory • any safety precautions you have used during an investigation in biology; provide specific details and the reasons for taking the precautions

  3. Use the information below to answer the following question. Students tested two cleansers for their effectiveness against bacteria. In their experiment, each cleanser was used on two different household surfaces. The students took samples from each surface before and after using each cleanser. Then they transferred each sample to a culture medium. The students counted the number of bacterial colonies that grew on each culture medium. The results of their test are shown in the table below. Which of these would be the best control for their experiment? • Use only Cleanser 1 on both sinks and counters. • Use Cleanser 1 on the sinks and Cleanser 2 on the counters. • Test the number of bacteria on the counters and sinks after scrubbing without using cleansers. • Test the number of bacteria on the counters and sinks without scrubbing with cleansers.

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