If extrinsic mortality is high: a) selection will act more strongly against mutations that negatively affect organisms late in life than early in life b) selection will act would act equally strongly on mutations that negatively affect organisms early in life and late in life c) organisms should age more rapidly than if extrinsic mortality was low d) a and c are correct e) b and c are correct

How does upwelling affect coastal fisheries? upwelling damages nutrient supplies at coastal fisheries as the warm, nutrient-rich surface water is replaced by nutrient-poor, cold water. upwelling damages nutrient supplies at coastal fisheries as the cold, nutrient-rich surface water is replaced by nutrient-poor, warm water. upwelling improves the nutrient supply at coastal fisheries as the warm, nutrient-rich surface water replaces the nutrient-poor, cold water. upwelling improves the nutrient supply at coastal fisheries as cold, nutrient-rich water replaces the warm, nutrient-poor surface water.

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled

What do your cells need to live? a. carbon dioxide b. carbon c. air d. oxygen