Question

Question 2 Scientists monitoring the world's oceans have been collecting pH data for many years. As the pH of our oceans decreases, or becomes more acidic, less calcium is available to marine organisms for growth and development. Which statement describes the outcome of a continued decrease in oceanic pH? a A decrease in pH would lead to a decrease in marine biodiversity and an increase in animal populations. b A decrease in pH would lead to a decrease in both marine biodiversity and animal populations. c A decrease in pH would lead to an increase in marine biodiversity and a decrease in animal populations. d A decrease in pH would lead to an increase in marine biodiversity and animal populations. Question 3 Which of the following would the introduction of hardy, generalist non-native species most likely cause? a decrease in the amount of decomposers on Earth b loss of native species by competition - especially, sensitive specialist species c increase in the amount of carbon dioxide in Earth's atmosphere d increase in the amount of local minerals and non-renewable resources

Answer 1

**Question 2:** The correct answer is **b**. A decrease in pH would lead to a decrease in both marine biodiversity and animal populations. As ocean acidity increases, it adversely affects the growth and development of marine organisms, particularly those that rely on calcium for their shells and structures, which can lead to decreased biodiversity and reduced populations.

**Question 3:** The correct answer is **b**. Loss of native species by competition - especially sensitive specialist species. The introduction of hardy, generalist non-native species can outcompete native species for resources, often leading to a decline or extinction of more specialized native species that cannot cope with the increased competition.