Exam 11: The Living Ocean

Mixotrophic plankton can photosynthesize.

Which of the following secrete gases in order to stay afloat?

In the oceans, thesize and abundance of organisms are directly related.

Which zone changes most with latitude?

The two most important inorganic nutrients for photosynthesis are

The most common function for bioluminescence in the ocean is thought to be attraction of mates during reproduction.

The most numerous organisms in the sea are the largest organisms.

Salmon spawn in seawater and Atlantic eels spawn in fresh water.

Autotrophs do not respire.

About 90% of the ocean is remarkably uniform in temperature, ranging from

Sunlight usually penetrates to a greater depth in coastal waters than in the open sea.

Molecular transport that acts upon momentum is called

Members of the most ancient group of organisms, the prokaryotes, still exist today.

Plankton are the “drifters of the sea” and include all of the following except

If an organism looks nearly identical and shares similar lifestyle characteristics as a known species, then the organism must belong to that species.

Sea cucumbers must drink seawater to set up a concentration gradient and prevent dehydration.

Bacteria that make their own organic compounds by obtaining energy from chemical compounds and not directly from light are known as

All phytoplankton and seaweeds require ______________ such as nitrogen and phosphorus.

At the level of species, the ocean is much less diverse than the terrestrial environment, with only approximately ______ percent of the total known species.

Organisms that can produce energy from inorganic compounds and also consume other organisms are best referred to as