amy is asked to determine the chemical composition of an unknown liquid sample. she determines that the sample is negative for protein, reducing sugars, and/or lipids. however, someone else has used up all of the iodine reagent. which scenario would allow amy to test the unknown sample for the presence of starch?

What must students do with the 10 gird-ins on the math section of the psat

Jessica wants to get a credit card, but the bank is refusing to give her one. what could be the possible reason behind the bank's refusal to comply with jessica's request? a. she does not have an account with the bank b. she has a bad credit history c. she has a good credit history d. she is 18 years old e. she doesn't have a job

The graph shows a trend in an ecosystem over time caused by increased pollution in the region. what can you conclude from the graph? a. there’s lower biodiversity among birds. b. there’s a higher reproductive rate among birds. c. there’s a significant decline in the number of producers. d. other types of animals were unaffected by pollution.