Why Is Nitrogen Fixation an Essential Process

question 24

Multiple Choice

Why is nitrogen fixation an essential process?

• A) Nitrogen fixation can only be done by certain prokaryotes.
• B) Fixed nitrogen is often the limiting factor in plant growth.
• C) Nitrogen fixation is very expensive in terms of metabolic energy.
• D) Nitrogen fixers are sometimes symbiotic with legumes.
• E) Nitrogen-fixing capacity can be genetically engineered.

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Definitions:

Linnaeus' Classification

A system of categorizing and naming organisms developed by Carl Linnaeus, based on shared physical characteristics.

Structural Differences

Variations in the physical or anatomical organization between organisms, cells, or molecules.

Evolutionary Species Concept

A definition of species based on evolutionary lineage, where a species is a lineage of populations which maintains its identity from other such lineages and has its own evolutionary tendencies and historical fate.

Natural Selection

The process by which organisms better adapted to their environment tend to survive and produce more offspring.