If the Flow of Energy in an Arctic Ecosystem Goes

question 20

Multiple Choice

If the flow of energy in an arctic ecosystem goes through a simple food chain, perhaps involving humans, starting from phytoplankton to zooplankton to fish to seals to polar bears, then which of the following could be TRUE?

• A) Polar bears can provide more food for humans than seals can.
• B) The total biomass of the fish is lower than that of the seals.
• C) Seal meat probably contains the lowest concentrations of fat-soluble toxins.
• D) Seal populations are larger than fish populations.
• E) Fish can potentially provide more food for humans than seal meat.