Ch. 14 pt. 2: Microbial Ecosystems

Question 1

Soil texture classification is based on the proportion of ___ that make up the soil.

* water and solids
* air, water, and solids
* sand and water
* sand, sil

Answer 1

sand, silt, and clay

Question 2

Where is the soil’s rhizosphere?

* areas surrounding plant roots
* areas in contact with bodies of water

Answer 2

areas surrounding plant roots

Question 3

Lignocellulose is mineralized primarily by what group of organisms during plant decomposition?

* archaea
* gram-positive bacteria
* fungi
* slime molds
* gram-negative

Answer 3

fungi

Question 4

The part of the soil that immediately surround the plant root is called the __.

Answer 4

rhizosphere

Question 5

The use of microorganisms to clean up chemically contaminated soils is called __.

Answer 5

bioremediation

Question 6

T/F:

Deep subsurface environments are considered to be void of microbial life.

Answer 6

False