Deep sea environment

Question 1

What does a hysographic curve show?

Answer 1

The relative depths of different regions of the ocean

Question 2

Below what depth is classified as the “deep ocean”?

Answer 2

200m

Question 3

What is azoic theory?

Answer 3

theory proposed by Edward Forbes in 1843 that nothing lives below 600m

Question 4

What is the dyphotic zone?

Answer 4

From 200-1000m (the twilight zone)

Question 5

Define bioluminescence

Answer 5

The generation of light from the oxidation of a luciferin substrate by a luciferase enzyme

Question 6

What is counter-illumination?

Answer 6

a camoflage method where pelagic organisms use bioluminescence to break up or mask their silhouette

Question 7

What is the aphotic zone?

Answer 7

below 1000m (midnight zone)

Question 8

Briefly describe a continental shelf

Answer 8

area of exposed rock slope above 200m predominately inhabited by filter feeders

Question 9

Briefly describe the typography of an abyssal plane

Answer 9

Up to 1km of sediment forming the flattest regions on earth

Question 10

What is a seamount

Answer 10

an active or extinct undersea volcano rising more than 1000km above the sea floor

Question 11

What is a midocean ridge?

Answer 11

up to 60,000km chain of underwater volcanoes

Question 12

How does a deposit feeder feed?

Answer 12

by extracting organic matter from the sediment

Question 13

What is a batch-reactor gut?

Answer 13

one entrance/exit, and episodic input/output

Question 14

What is a continuous flow stirred-tank reactor gut?

Answer 14

separare entrance/exit, continuous input/output

Question 15

What is a plug flow reactor gut?

Answer 15

separate entrance/exit, episodic input/output

Question 16

What is the island rule?

Answer 16

Colonists of islands tend to evolve contrasting body sizes to their ancestors