Why are hydroponics used in mineral nutrition experiments examining essential elements?
What will be an ideal response?
ANSWER: Soil is a mix of complex mineral particles, so using soils collected in the field would not
work because you could not be sure of systematically omitting specific essential elements
and the processes related to soil nutrients, including the activity of bacteria and fungi. Even
if you had sterile soil and could keep it sterile, soil characteristics affect the availability of
nutrient elements independent of concentration; for example, cation exchange.
You might also like to view...
The negatively charged component of the atom is the
A. proton. B. nucleus. C. neutron. D. electron.
A diagram that hypothesizes a set of organisms' evolutionary relationships to one another is a
a. comparison tree. b. phylogenetic tree. c. classification tree. d. taxonomic tree. e. species tree
How is the chromosome of a bacterial cell replicated?
a. The linear DNA molecule is replicated from multiple origins of replication bidirectionally. b. The linear DNA molecule is replicated from one origin of replication bidirectionally. c. The circular DNA molecule is replicated from multiple origins of replication bidirectionally. d. The circular DNA molecule is replicated from one origin of replication bidirectionally. e. The circular DNA molecule is replicated from one origin of replication unidirectionally.
Of the following choices, which has the elastic recoil of its walls during diastole, causing a continuation of blood flow throughout the cardiac cycle?
A) artery B) venule C) vein D) capillary E) arteriole