The decomposed, organic matter of soil is

a. sand.
b. clay.
c. humus.
d. silt.
e. loam.


C

Biology & Microbiology

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Which is an example of potential energy rather than kinetic energy?

A. a pile of leaves that have been burned B. a candle giving off light C. a firefly using light flashes to attract a mate D. an apple made up of energy-rich macromolecules E. a skier at the bottom of the hill instead of the top of the hill

Biology & Microbiology

The dominant vegetation of the temperate rain forest includes all of the following except:a

Sitka spruce. b. western red cedar. c. beech. d. Douglas fir. e. western hemlock

Biology & Microbiology

Which type of skeleton contains the carbohydrate called chitin

a. exoskeleton of insects, crabs, and lobsters b. hydrostatic skeleton of earthworms c. fluid skeleton of jellyfish endoskeleton of lizards d. appendicular skeleton of humans

Biology & Microbiology

The ability to tolerate lactose throughout life most likely arose in ________

A) populations that live in cold climates B) populations that live in wet climates C) cultures that keep dairy herds D) Native Americans

Biology & Microbiology