Question

6. Circle the correct answers. Stress proteins are a more Mess specific biomarker (re: Chemical specificity) than is the case for AChE-inhibition. The ecological relevance is higher lower for eggshell thinning than is the case for DNA adduct formation. The biological specificity is higher dower for eggshell thinning than is the case for DNA adduct formation. (2 points). stands for . wee s, wapo sai%, ALAD inhibition measures exposure to .Lea (2 points + 1 bonus point) BONUS: "ALAD" stands for 40wlin pumsats dcih) 8. what is the official definition of"Life Cycle Assessment"? (2 points) 9. Circle the correct answer. When doing a Life Cycle Assessment, the hardest part to do (and something that was not done in the two examples covered in class), was the: inventory classification/characterization/ valuation. (1 point). 10. Circle the two correct answers. When doing a Life Cycle Assessment, assigning relative values or weights to the different types of impacts and integrating these across impact categories, is the characterization/ valuation classification step that is itself part of the inventory /impact assessment / improvement assessment. (2 points) 11. Circle the two correct answers. When doing a Life Cycle Assessment, quantifying the mpacts for each of the types of impacts that were previously identified for a specific product, is part of the characterization/ valuation / classification step that is itself part of the inventory impact assessment / improvement assessment. (2 points) 12. Circle the 2 correct answers. When toxicity of a mixture of two chemicals is lower than what you expect on the basis of the toxicity of each chemical by itself, this is: antagonism/potentiation / no interaction (additive effects). Could this be due to one of the chemicals inducing an enzyme system that detoxifies the other chemical? yes / no (2 points) Answer both parts below for a case where toxic effects of EE2 and TBT are additive. A. If EE2 is 10x more toxic than TBT, what would be the Toxic Equivalent Factors be for these chemicals? For EE2: ....For TBT 13. (1 point) B. What would be the total concentration in ㎍L EE2 Toxic Equivalents (EE2-TEQs), of a mixture with 5 ng/L EE2 and 20 μgL TBT? (1 point) (f you can not do the math without a calculator, just write out the equation here)
Environmental toxicology

Answer 1

Ans 8:

Definition of life cycle assessment:

In simpler words, LCA is the assessment of environmental impacts caused during the life cycle of a product or process.

According to EPA,

Definition by EPA

An LCA is a comprehensive method for assessing a range of environmental impacts across the full life cycle of a product system, from materials acquisition to manufacturing, use, and final disposition.