Refer to the Graph

question 85

Multiple Choice

Refer to the graph. According to the graph, which statement best describes the relationship between total plant cover (a measure of productivity) and number of species (species richness) in test plots?

• A) Greater species richness is associated with lower productivity.
• B) Greater species richness is associated with greater productivity.
• C) Productivity and species richness do not appear to show a relationship.
• D) Productivity remains relatively high regardless of total plant cover.
• E) Productivity increases when species richness is low but decreases when it is high.

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Definitions:

Allele

A variation that makes a gene different in some way from other genes for the same characteristics. Many genes never vary; others have several possible alleles.

Gene

A unit of heredity made up of DNA that is located on a chromosome and can influence physical or behavioral traits, and can be passed from one generation to the next.

Chromosome

Structures within cells that contain DNA and carry genetic information responsible for determining the traits of an organism.

Microbiome

The collective genome of the microbes (composed of bacteria, bacteriophage, fungi, protozoa, and viruses) that live inside and on the human body.