Problem 5 - Biology: The Dynamic Science

Question

Chemical pollutants: a. can spread rapidly from the places they are released. b. do not appear to influence global climate change. c. have contributed to global mass extinctions. d. rarely affect natural bodies of water. e. rarely influence animals feeding at higher trophic levels.

Step-by-Step Solution

Answer

Statements a and c are true about chemical pollutants while statements b, d and e are false.

Step 1: Understanding what are chemical pollutants

Chemical pollutants are substances introduced into the environment that can cause harm to ecosystems, including animals and plants, as well as systems such as the water supply.

Step 2: Assessing the statements

Evaluate each statement. Statement a is true as chemical pollutants can spread extensively over time and space from their source due to factors like wind, water flow, and animal activities. Statement b is false as numerous studies have linked chemical pollutants with climate change. Statement c is true given that pollutants can lead to population declines and extinction of vulnerable species. Statement d is false as pollutants often end up in natural water bodies causing harm to aquatic life. Statement e is also false as bioaccumulation enables pollutants to concentrate in animals at higher trophic levels.

Step 3: Selecting the correct answers

Based on the analysis in step 2, a, c might be true, while b, d, e are false about chemical pollutants. Thus, the correct answers are a and c.