Exam 37: Communities and Ecosystems

The physical place where members of a population typically live is termed a:

A species that is so important to its community (such as the sea otter)that their removal can dismantle a food web is termed a:

The cause of the sea otter population decline in the Pacific Northwest was primarily an oil spill.

Energy flows in only one direction through an ecosystem.

Carbon returns to the atmosphere:

In ecology a community that remains fairly constant over time is referred to as a:

An insect that resembles the face of a snake is using ___ to avoid predation.

In biosphere II,the system did not remain totally self-contained because soil bacteria produced more CO₂ than anticipated requiring oxygen to be pumped in from outside.

A food chain is a series of organisms that:

A plant that can grow in soil temperatures of 65°C is occupying _________.

What adaptations would panic grass growing at 65°C need to employ to avoid dehydration?

The "net primary productivity" is:

The total of all the resources,both biotic and abiotic,a species exploits for its survival,growth,and reproduction is its:

Panic grass is a(an)________.

Zooplankton are which of the following?

A genetic change in one species that selects for a subsequent change in a different species is termed:

A gradual change in a community's species composition,occurring as competing organisms respond to and modify the physical environment is termed:

In ______________________ bacteria return nitrogen to the atmosphere by converting nitrates to N₂.

___________________ states that two species cannot coexist indefinitely in the same niche.

A type of symbiosis in which both species benefit is: