Homework answers / question archive / Question 1 1 / 1 pts Algin (alginate) is a commercial product that is harvested from     Fish     Crabs     Seaweed (kelp)     Sediments     Whales     Question 2 1 / 1 pts Which commercial fishing technique is damaging to slow-growing organisms and complex ecosystems?    Purse sine     Drift netting     Bottom trawling     Long line fishing     Question 3 1 / 1 pts Animals that are unintentionally killed while collecting desirable organisms are know as    Sidecatch     Non-extractive organisms     Bycatch     MSYs     Question 4 1 / 1 pts Waves, tides, and currents are a potential source of marine energy

Question 1 1 / 1 pts Algin (alginate) is a commercial product that is harvested from     Fish     Crabs     Seaweed (kelp)     Sediments     Whales     Question 2 1 / 1 pts Which commercial fishing technique is damaging to slow-growing organisms and complex ecosystems?    Purse sine     Drift netting     Bottom trawling     Long line fishing     Question 3 1 / 1 pts Animals that are unintentionally killed while collecting desirable organisms are know as    Sidecatch     Non-extractive organisms     Bycatch     MSYs     Question 4 1 / 1 pts Waves, tides, and currents are a potential source of marine energy

Biology

Share With

---

Question 1

1 / 1 pts

Algin (alginate) is a commercial product that is harvested from 

  

Fish

   

Crabs

   

Seaweed (kelp)

   

Sediments

   

Whales

 

 

Question 2

1 / 1 pts

Which commercial fishing technique is damaging to slow-growing organisms and complex ecosystems?

  

Purse sine

   

Drift netting

   

Bottom trawling

   

Long line fishing

 

 

Question 3

1 / 1 pts

Animals that are unintentionally killed while collecting desirable organisms are know as

  

Sidecatch

   

Non-extractive organisms

   

Bycatch

   

MSYs

 

 

Question 4

1 / 1 pts

Waves, tides, and currents are a potential source of marine energy. 

  

True

   

False

 

 

Question 5

1 / 1 pts

Why is fisheries management more difficult than managing other resources?

  

It is difficult to get an accurate count of fish species in the ocean

   

Many of the fish species that are being harvested are new to science

   

There is little or no support for this type of management

   

It is run by the commercial fishing industry, which tends to falsify data

 

 

Question 6

1 / 1 pts

Why is horizontal drilling preferable in some cases to vertical drilling?

  

It can pick up more oil

   

It is cheaper

   

It can be drilled from land and aimed at the continental shelf

   

It is faster

 

 

IncorrectQuestion 7

0 / 1 pts

Where is methane hydate found?

  

In the sediments of the deep ocean

   

In the shallow water sediments of the continental shelf

   

In the sediments of some continental slopes

   

In the shallow ice layers of the arctic ocean

 

 

Question 8

1 / 1 pts

What is a potential drawback of mining methane hydrate and using it as an energy source?

  

It is not very abundant

   

Methane gas is not very flammable

   

The use if this fuel will put oil companies out of business

   

Removing methane stored in marine sediments may contribute to climate change

 

 

Question 9

1 / 1 pts

Which of the following is a nonrenewable resource? 

  

Fish

   

Wind energy

   

Seaweed

   

Mineral deposits

 

 

Question 10

1 / 1 pts

What conditions in the past were necessary for the eventual production of oil?

  

High productivity that fostered high populations of marine animals that eventually would die and settle to the sea floor. 

   

The accumulation of organic sediments in very deep water, which can then be carried below the crust at convergent plate boundaries. 

   

Growth of massive fern forests that in shallow wetlands. 

   

The accumulation of planktonic organisms and bacteria in quiet basins where the oxygen supply was low.

 

 

Question 11

1 / 1 pts

What is a result of overfishing?

  

Increased supply of valuable species

   

The lowering of seafood prices

   

Increased wages for the commercial fishing industry

   

Not enough breeding stock is left to replenish a species

 

 

Question 12

1 / 1 pts

What is necessary to convert hydrocarbons into oil?

  

Passive margins and thick continental rise

   

Strong currents, cool water, and plate movement

   

Pressure, heat, and time

   

Deep water, darkness, and little current

 

 

Question 13

1 / 1 pts

Sand dredged from the ocean is used in the production of cement, glass, and other building materials. 

  

True

   

False

 

 

Question 14

1 / 1 pts

About 1/3 of the worlds ______ is produced from seawater by evaporation. 

  

Algae for biofuel

   

Table salt

   

Silica sand

   

Freshwater

 

 

Question 15

1 / 1 pts

Extraction of wind energy over or near the ocean is especially effective because

  

It is cheaper to install and maintain turbines over the ocean

   

They can be combined with oil platforms

   

Average wind speed is lower over the ocean compared to land

   

Wind is steady (less gusty) over the ocean