Ocean Waters and Ocean Life

What factors influence a region's photosynthetic productivity?

I. availability of nutrients

II. amount of solar radiation

III. distance from the shore

• I &II

• I & III

• II & III

• I, II, & III

What do you call each of the feeding stages in a food chain?

• trophic level

• morphic level

• transverse level

• converse level

The energy loss between trophic levels correlates with a general decrease in _______ within a higher trophic level.

• life zones

• food web

• number of individuals and total biomass

• none of the above

If you were a commercial fisher, in which of these marine life zones would you concentrate your efforts?

I. intertidal

II. neritic

III. oceanic

• I

• II

• III

• I & II

What classification of the marine organism is capable of moving independently of the ocean currents?

I. Plankton

II. Nekton

III. Benthos

• I

• II

• III

• I, II & III

Decreasing ocean temperature causes the density of the water to __.

• Decrease

• Increase

• Stay the same

• Not affected at all

What do you call the proportion of dissolved salts to pure water?

• Salinity

• Temperature

• Density

• Viscosity

Low-latitude regions have relatively warm surface water and distinctly colder water at depth.

• True

• False

• Partly True

• Partly False

Bacteria-like organisms called archaea constitute the base of the food web around hydrothermal vents.

• True

• False

• Partly True

• Partly False

The transfer of energy between trophic levels is very efficient.

• True

• False

• Partly True

• Partly False