Choose True for yes or choose false for no for each statement 1) Gray whales may experience a shift in their realised niche True or false 2) Killer whales may no longer prey on gray whales True or false 3) Extirpation of the killer whale will not substantially affect the structure of this foodweb True or false Scientists anticipate that dramatic summertime loss of sea ice in the Arctic will causephytoplankton abundance to increase.SeabirdsHumanPolar bearce algaeSealZooplanktonPhytoplanktonBelugawhaleBowheadwhaleArctic/SaffronCodKiller whaleWalrusEpibenthosAlgae matGraywhaleBenthosIs the following statements consistent with the data presented in the food webabove?

Choose True for yes or choose false for no for each statement 1) Gray whales may experience a shift in their realised niche True or false 2) Killer whales may no longer prey on gray whales True or false 3) Extirpation of the killer whale will not substantially affect the structure of this foodweb True or false

Choose True for yes or choose false for no for each statement 1) Gray whales may experience a shift in their realised niche True or false 2) Killer whales may no longer prey on gray whales True or false 3) Extirpation of the killer whale will not substantially affect the structure of this foodweb True or false

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter4: Energy And Metabolism

Section: Chapter Questions

Problem 1DID: The genus Ferroplasma consists of a few species of acid-loving archaea. One species, F. acidarmanus,...

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The genus Ferroplasma consists of a few species of acid-loving archaea. One species, F. acidarmanus, was discovered to be the main component of slime streamers (a type of biofilm) deep inside an abandoned California copper mine (Figure 4.11A). F. acidarmanus cells use an ancient energy-harvesting pathway that combines oxygen with ironsulfur compounds in minerals such as pyrite. This reaction dissolves the minerals, so groundwater that seeps into the mine ends up with extremely high concentrations of metal ions such as copper, zinc, cadmium, and arsenic. The reaction also produces sulfuric acid, which lowers the pH of the water around the cells to zero. Despite living in an environment with a composition similar to hot battery acid, F. acidarmanus cells maintain their internal pH at a cozy 5.0. Thus, researchers investigating Ferroplasma metabolic enzymes were surprised to discover that most of the cells enzymes function best at very low pH (Figure 4.11B). A. Deep inside one of the most toxic sites in the United States: Iron Mountain Mine, in California. The water in this stream, which is about 1 meter (3 feet) wide in this photo, is hot (around 40C, or 104F), heavily laden with arsenic and other toxic metals, and has a pH of zero. Slime streamers growing in it are a biofilm dominated by a species of archaea, Ferroplasma acidarmanus. B. pH profiles of four enzymes isolated from F. acidarmus. Researchers had expected these enzymes to function best at the cells cytoplasmic pH (5.0). What does the dashed line signify?
Few synthetic organic chemicals are dangerous in the very low concentrations in which they enter the ocean. How are these concentrations increased? What can be the outcome when these substances are ingested by organisms in a marine food chain?
The following diagram illustrates a typical marine food web. Mercury, a toxic heavy metal, can accumulate in the fatty tissue of organisms. Which organism would you predict to have the highest level of mercury? Explain your answer.