Answers 5120VB Environmental Science Sem B- BGlobal Connection: Deep Sea Ecologies

Global Connection: Deep Sea Ecologies Answers

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Which of the following is not a possible source of energy for chemosynthetic organisms?

oil

hydrogen sulfide

methane

water

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What are the two ways that organisms on the bottom of deep sea food chains acquire energy?

photosynthesis and chemosynthesis

chemosynthesis and marine snow

marine snow and photosynthesis

chemosynthesis and predation

Which of the following organism does not gain energy from marine snow either directly or indirectly?

rays

crustaceans

chemosynthetic bacteria

sponges

How does energy acquisition in the deep sea differ from energy acquisition near the ocean’s surface?

Organisms in the deep sea acquire energy directly from the sun.

Organisms near the ocean’s surface rely on chemosynthesis rather than photosynthesis.

Organisms in the deep sea do not have direct access to sunlight.

Organisms in the deep sea have no means to obtain energy unless they travel to the ocean’s surface.

Marine snow is _______.

pieces of organic matter that were once part of living organisms

a mixture of living plankton

snow from land that has entered aquatic ecosystems

large salt crystals that have not dissolved in ocean water