Exam 13: Life in the Ocean

What are Darwin's postulates of natural selection?

What is needed for living matter to function?

What can increase the variation of genetic traits in a population?

Freshwater animals exert large amounts of energy to transport water from their tissues back to the outside because they are hypertonic to their surroundings.

A small cell having a high surface-to-volume ratio is more efficient than a large cell with a high volume-to-surface ratio.

What is a heterotroph?

Which is considered a physical factor?

What is rarely a limiting factor for marine organisms?

Archaea may be more closely related to Eukarya than Bacteria.

What are trophic levels? Why is it better to eat organisms lower on the tropic pyramid?

Once living organisms reach a balance with their environment, they do not undergo any more natural selection.

Although ectotherms can tolerate large ranges in external temperature, they are unable to sustain large fluctuations in their internal temperatures.

What is the largest biogeochemical cycle?

How does carbon enter the atmosphere? What effect does it have on Earth? How does it cycle back for use in biological components?

How deep is the photic layer usually along the coasts?

What is an advantage of using scientific names?

What is the immediate organic material produced from inorganic substances?

What is a more accurate term for the feeding relationship of organisms?

All life on Earth is fundamentally the same.

What organism usually fixes nitrogen into usable chemical forms?