Earth Science Chapter 6

ecosystem

A(n) ____________________ is a functional unit of the ecosphere in which living and nonliving components interact dynamically and exchange materials.

Perpetual Ice ; Tropical Rain Forest

According to 06_16_Figure.jpg (on Page 156), which terrestrial biome has the lowest percentage of phytomass and whch one has the greast percentage of phytomass?

True

According to the text, the present and predicted extinction rates are likely related to human activities.

float ; swim

In addition to differences in size, the main difference between "Plankton" and "Nekton" (types of pelagic flora and fauna) is that plankton can only _____________ while nekton can _____________.

sunlight

In the metabolic process generally known as photosynthesis (or photoautotrophy in the text) plants or plant-like microbes use inorganic carbon in the form of carbon dioxide from the atmosphere and water and process them in the presence of nutrients and ___________________ to make more complex organic molecules and an important gaseous byproduct.

200; 6000

Most life is found between an ocean depth of _________ meters and an altitude of ___________ meters.

synthesize their own food.

Organisms whose metaboloic pathway is described as "heterotrophic" cannot __________________.

water

The five compounds which can act as oxidizing agents in remineralization of organic matter include: oxygen, nitrate, iron oxide, sulfate and ________________.

terrestrial and aquatic

The two major ecosystems are ______________ and _________________.

not composed of cells.

Viruses are not technically considered to be alive because they are _______________.

oxygen

What is the gaseous by-product of photosynthesis necessary as an electron receptor for metabolic cellular respiration to occur?

Prokaryotes do all of these.

Which of the following biochemical processes are completed by Prokaryotes?

Producers

_____________ are autotrophs which produce organic matter from inorganic carbon and are the base of the food chain.

Autotrophy

______________ is a catabolic biochemical pathway in organisms in which inorgainic carbon in the environment is utilized for conversion into organic matter.

Decomposers

_____________________ serve the important function of recycling nutrients in a sustainable ecosystem to maintain balance.

Two answers are correct.

______________________ are heterotrophs which consume the producers or feed on other animals.