Deep-Sea Biotic/Abiotic Factors

Which of the following abiotic factors is present in most ocean ecosystems, but not deep-sea ecosystems?

• Water

• Sunlight

• Oxygen

• Soil

Since there is no sunlight in the deep sea, there is no photosynthesis either. What method of energy production is used by primary producers in the deep sea?

• Liposynthesis

• Primary consumption

• Chemosynthesis

• There are no primary producers in the deep sea

Which of the following vertebrate groups has probably never lived or hunted in the deep sea?

• Fish

• Mammals

• Amphibians

• Reptiles

Which of the following invertebrate groups has not been found in the ocean, let alone the deep sea?

• Worms

• Snails

• Insects

• Arachnids

Scientists have hypothesized that most deep-sea organisms get their food from little bits of dead stuff that slowly sinks to the bottom. What do they call this detritus?

• Marine rain

• Marine snow

• Marine sleet

• Marine hail