NS 2 Life in the Sea

What is marine biology?

• The branch of science that deals with the living, or organic, content of the ocean--it's plants and animals.

• The branch of science that deals with the biology of Marines.

• The study of life.

• The study of plants and animals.

What are the two broad categories of plankton?

• Phytoplankton and animalcules

• Animals and zooplankton

• Zooplankton and phytoplankton

• Light-seeking and light-averse

Upwelling is important because

• it provides nutrients directly to sea birds.

• it powers the el nino cycle.

• it powers the la nina cycle.

• it brings nutrients from the depths up to the lighted and twilight zones and supports plankton.

Sea animals are divided into two broad categories:

• plankton and sea mammals.

• zooplankton and phytoplakton

• those with jaws and those without jaws.

• mammals and fish.

Hagfish

• are extinct.

• are examples of sea animals without jaws.

• have jaws lined with two rows of teeth.

• live by eating the small fish that are often found around coral reefs.

According to the text, where do most sea animals live?

• Near the continental shelf.

• In the deep ocean depths.

• Near the continental slope.

• Near the heat vents.

What is aquaculture?

• Building near the oceans.

• The lifestyle of the seas.

• Farming of sea life.

• Fishing in the open ocean.

What is bioluminescence?

• Light created by radioactive materials at sea or on shore.

• Light emitted by certain minerals oftem found at sea.

• Light created by cool gases as they glow as a result of relatively warmer water.

• Light created by living organisms such as certain insects, cerain fish of the abyss, and microscopic organisms,

The term "deep scattering layer" refers to

• an interesting biological phenomenon discovered during World War Two.

• the scattering of light at a certain depth located near the bottom of the twilight layer.

• the layer below which sea mammals scatter to avoid predators.

• the layer at which phytoplankton scatters during the phenomenon known as upwelling.

Which of the following is the source of most waves?

• Seaquakes

• Earthquakes

• Volcanos

• Wind