Unit 6 (Ch. 3-4) Review

It is theorized that the oceans formed

• almost immediately on formation of the atmosphere.

• only after Earth cooled enough for water to accumulate on the surface.

• only in the last 40,000 years.

• none of the answer choices

The most compelling evidence that supports the theory that life began in the oceans is

• based on how scientists interpret the fossil record.

• the oceans are still a “primordial soup.”

• completely without a basis in the fossil record.

• the findings of the Miller-Urey experiment

According to theory, the first molecular building blocks of life

• were caused by lightening striking the ocean.

• are readily formed under certain conditions by natural processes.

• formed with the Big Bang.

• were caused by violent volcanic eruptions heating the oceans.

Abiogenesis is

• the origin of life from nonliving matter.

• exactly the opposite of spontaneous generation.

• BOTH the origin of life from nonliving matter AND exactly the opposite of spontaneous generation.

• none of the answer choices

The theory of evolution says that modern organisms and their characteristics arose through the processes of _____ and _____ over millions of years.

• natural selection, spontaneous generation

• abiogenesis, spontaneous generation

• spontaneous generation, mutation

• mutation, natural selection

The ____ zone refers to the water portion of the ocean. The ____ zone refers to the bottom.

• benthic, abyssal

• abyssal, benthic

• abyssal, pelagic

• pelagic, benthic

The zone between the low-tide mark and the edge of the continental shelf is the

• intertidal zone

• neritic zone

• oceanic zone

• bathyal zone

The zone of DEEP water in the open ocean that does NOT include the ocean floor is the

• epipelagic zone

• mesopelagic zone

• bathypelagic zone

• abyssopelagic zone

Shore bottom that is splashed but not submerged is the ____ zone of the benthic zone.

• supralittoral

• littoral

• inner sublittoral

• hadal

A tiger shark is an example of a _______ organism

• plankton

• nekton

• benthic

• autotrophic