Chapter 11 (Mesopelagic) Review

How much of the ocean have humans explored?

• 10%

• 30%

• 50%

• 90%

Which zone is at the top of the "deep ocean"

• Bathypelagic

• Hadopelagic

• Mesopelagic

• Abyssopelagic

Why are there less producers in the mesopelagic?

• Less light available for photosynthesis

• Too many predators

• Too many phytoplankton

• Too much wave action

How is the food chain started if there are no producers in the mesopelagic

• Vertical migration of phytoplankton to feed on zooplankton at the surface

• Phytoplankton sink down at night to allow zooplankton to feed on them

• Marine snow drifting down

• Vertical migration of zooplankton to feed on phytoplankton at the surface

Are most fish in the mesopelagic large or small?

• Large

• Small

• There is an even distribution of both large and small fish

• There are no fish in the mesopelagic, only cephalopods and crustaceans

How do the eyes of mesopelagic fish compare to other fish

• Very large to take in more light

• Very large to take in less light

• Very small to take in more light

• All fish in the mesopelagic do not have eyes because of the complete darkness

What is countershading?

• The animal is light colored on the bottom (ventral side) and dark colored on the top (dorsal side)

• The animal is dark colored on the bottom (ventral side) and light colored on the top (dorsal side)

• The animal is light colored all over

• The animal is dark colored all over

How are the jaws of mesopelagic fish different from fish that live in shallow water?

• They are typically much smaller, to increase their chance of catching prey

• They are typically much larger, to increase their chance of catching prey

• They are typically the same as most other fish

• The jaw size is evenly distributed throughout mesopelagic fishes

Some mesopelagic fishes have photophores (light producing organs)

• True

• False

Based on the "Deep Dive Simulation" Assignment we completed in class. How do the amount of organisms change as you change depth.

• As you increased in depth, the amount of organisms increases.

• As you increased in depth, the amount of organisms does not change

• As you increased in depth, the amount of organisms decreased.

• You aren't sure what I mean by "increased in depth" and so you cannot answer this question accurately (Be honest, you can still be marked correct for this answer choice)